21113012202102 has 24 divisors (see below), whose sum is σ = 46427618874936. Its totient is φ = 6932630871936.

The previous prime is 21113012202077. The next prime is 21113012202143. The reversal of 21113012202102 is 20120221031112.

21113012202102 is a `hidden beast` number, since 211 + 130 + 1 + 220 + 2 + 102 = 666.

It is a super-2 number, since 2×21113012202102² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8753320603 + ... + 8753323014.

It is an arithmetic number, because the mean of its divisors is an integer number (1934484119789).

Almost surely, 2^{21113012202102} is an apocalyptic number.

21113012202102 is an abundant number, since it is smaller than the sum of its proper divisors (25314606672834).

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

21113012202102 is a wasteful number, since it uses less digits than its factorization.

21113012202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17506643692 (or 17506643689 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21113012202102 its reverse (20120221031112), we get a palindrome (41233233233214).

The spelling of 21113012202102 in words is "twenty-one trillion, one hundred thirteen billion, twelve million, two hundred two thousand, one hundred two".