21113044212102 has 32 divisors (see below), whose sum is σ = 42304366540800. Its totient is φ = 7024638649248.

The previous prime is 21113044212067. The next prime is 21113044212131. The reversal of 21113044212102 is 20121244031112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23218224 + ... + 24110412.

It is an arithmetic number, because the mean of its divisors is an integer number (1322011454400).

Almost surely, 2^{21113044212102} is an apocalyptic number.

21113044212102 is an abundant number, since it is smaller than the sum of its proper divisors (21191322328698).

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

21113044212102 is a wasteful number, since it uses less digits than its factorization.

21113044212102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899500.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21113044212102 its reverse (20121244031112), we get a palindrome (41234288243214).

The spelling of 21113044212102 in words is "twenty-one trillion, one hundred thirteen billion, forty-four million, two hundred twelve thousand, one hundred two".