21203302122220 has 48 divisors (see below), whose sum is σ = 44607887922528. Its totient is φ = 8465910243840.

The previous prime is 21203302122199. The next prime is 21203302122227. The reversal of 21203302122220 is 2222120330212.

It is a super-2 number, since 2×21203302122220² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203302122191 and 21203302122200.

It is not an unprimeable number, because it can be changed into a prime (21203302122227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37210902 + ... + 37776418.

It is an arithmetic number, because the mean of its divisors is an integer number (929330998386).

Almost surely, 2^{21203302122220} is an apocalyptic number.

21203302122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21203302122220 is an abundant number, since it is smaller than the sum of its proper divisors (23404585800308).

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

21203302122220 is a wasteful number, since it uses less digits than its factorization.

21203302122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568930 (or 568928 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21203302122220 its reverse (2222120330212), we get a palindrome (23425422452432).

The spelling of 21203302122220 in words is "twenty-one trillion, two hundred three billion, three hundred two million, one hundred twenty-two thousand, two hundred twenty".