21001120202112 has 64 divisors (see below), whose sum is σ = 55785483918000. Its totient is φ = 7000215486464.

The previous prime is 21001120202009. The next prime is 21001120202159. The reversal of 21001120202112 is 21120202110012.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-3 number, since 3×21001120202112³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21001120202091 and 21001120202100.

It is a congruent number.

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, 17088988 + ... + 18276644.

Almost surely, 2^{21001120202112} is an apocalyptic number.

It is an amenable number.

21001120202112 is an abundant number, since it is smaller than the sum of its proper divisors (34784363715888).

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

21001120202112 is a wasteful number, since it uses less digits than its factorization.

21001120202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233723 (or 1233711 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21001120202112 its reverse (21120202110012), we get a palindrome (42121322312124).

The spelling of 21001120202112 in words is "twenty-one trillion, one billion, one hundred twenty million, two hundred two thousand, one hundred twelve".