21031322002220 has 12 divisors (see below), whose sum is σ = 44165776204704. Its totient is φ = 8412528800880.

The previous prime is 21031322002183. The next prime is 21031322002237. The reversal of 21031322002220 is 2220022313012.

It is a happy number.

21031322002220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21031322002220² (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: 1051566100111 = 21031322002220 / (2 + 1 + 0 + 3 + 1 + 3 + 2 + 2 + 0 + 0 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 21031322002192 and 21031322002201.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 525783050036 + ... + 525783050075.

It is an arithmetic number, because the mean of its divisors is an integer number (3680481350392).

Almost surely, 2^{21031322002220} is an apocalyptic number.

21031322002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21031322002220 is an abundant number, since it is smaller than the sum of its proper divisors (23134454202484).

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

21031322002220 is a wasteful number, since it uses less digits than its factorization.

21031322002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051566100120 (or 1051566100118 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21031322002220 its reverse (2220022313012), we get a palindrome (23251344315232).

The spelling of 21031322002220 in words is "twenty-one trillion, thirty-one billion, three hundred twenty-two million, two thousand, two hundred twenty".