21120001202112 has 28 divisors (see below), whose sum is σ = 55880003181096. Its totient is φ = 7040000400640.

The previous prime is 21120001202029. The next prime is 21120001202117. The reversal of 21120001202112 is 21120210002112.

It is a junction number, because it is equal to n+sod(n) for n = 21120001202091 and 21120001202100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120001202117) 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, 55000002939 + ... + 55000003322.

Almost surely, 2^{21120001202112} is an apocalyptic number.

It is an amenable number.

21120001202112 is an abundant number, since it is smaller than the sum of its proper divisors (34760001978984).

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

21120001202112 is a wasteful number, since it uses less digits than its factorization.

21120001202112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110000006276 (or 110000006266 counting only the distinct ones).

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

Adding to 21120001202112 its reverse (21120210002112), we get a palindrome (42240211204224).

The spelling of 21120001202112 in words is "twenty-one trillion, one hundred twenty billion, one million, two hundred two thousand, one hundred twelve".