21010012202120 has 32 divisors (see below), whose sum is σ = 47272777009920. Its totient is φ = 8403960515520.

The previous prime is 21010012202111. The next prime is 21010012202141. The reversal of 21010012202120 is 2120221001012.

It is a super-2 number, since 2×21010012202120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21010012202095 and 21010012202104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6896279 + ... + 9464601.

It is an arithmetic number, because the mean of its divisors is an integer number (1477274281560).

Almost surely, 2^{21010012202120} is an apocalyptic number.

21010012202120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21010012202120 is an abundant number, since it is smaller than the sum of its proper divisors (26262764807800).

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

21010012202120 is a wasteful number, since it uses less digits than its factorization.

21010012202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772845 (or 2772841 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21010012202120 its reverse (2120221001012), we get a palindrome (23130233203132).

The spelling of 21010012202120 in words is "twenty-one trillion, ten billion, twelve million, two hundred two thousand, one hundred twenty".