21122310301220 has 12 divisors (see below), whose sum is σ = 44356851632604. Its totient is φ = 8448924120480.

The previous prime is 21122310301163. The next prime is 21122310301229. The reversal of 21122310301220 is 2210301322112.

It can be written as a sum of positive squares in 2 ways, for example, as 10116623480896 + 11005686820324 = 3180664^2 + 3317482^2 .

It is a super-2 number, since 2×21122310301220² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1056115515061 = 21122310301220 / (2 + 1 + 1 + 2 + 2 + 3 + 1 + 0 + 3 + 0 + 1 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 21122310301192 and 21122310301201.

It is not an unprimeable number, because it can be changed into a prime (21122310301229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528057757511 + ... + 528057757550.

It is an arithmetic number, because the mean of its divisors is an integer number (3696404302717).

Almost surely, 2^{21122310301220} is an apocalyptic number.

21122310301220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122310301220 is an abundant number, since it is smaller than the sum of its proper divisors (23234541331384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21122310301220 is a wasteful number, since it uses less digits than its factorization.

21122310301220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056115515070 (or 1056115515068 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21122310301220 its reverse (2210301322112), we get a palindrome (23332611623332).

The spelling of 21122310301220 in words is "twenty-one trillion, one hundred twenty-two billion, three hundred ten million, three hundred one thousand, two hundred twenty".