21100202112012 has 48 divisors (see below), whose sum is σ = 49377524676480. Its totient is φ = 7012892693632.

The previous prime is 21100202111999. The next prime is 21100202112109. The reversal of 21100202112012 is 21021120200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100202111982 and 21100202112000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5763043 + ... + 8684069.

It is an arithmetic number, because the mean of its divisors is an integer number (1028698430760).

Almost surely, 2^{21100202112012} is an apocalyptic number.

It is an amenable number.

21100202112012 is an abundant number, since it is smaller than the sum of its proper divisors (28277322564468).

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

21100202112012 is a wasteful number, since it uses less digits than its factorization.

21100202112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2922790 (or 2922788 counting only the distinct ones).

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

Adding to 21100202112012 its reverse (21021120200112), we get a palindrome (42121322312124).

The spelling of 21100202112012 in words is "twenty-one trillion, one hundred billion, two hundred two million, one hundred twelve thousand, twelve".