21112102424344 has 8 divisors (see below), whose sum is σ = 39585192045660. Its totient is φ = 10556051212168.

The previous prime is 21112102424243. The next prime is 21112102424459. The reversal of 21112102424344 is 44342420121112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1319506401514 + ... + 1319506401529.

Almost surely, 2^{21112102424344} is an apocalyptic number.

It is an amenable number.

21112102424344 is a deficient number, since it is larger than the sum of its proper divisors (18473089621316).

21112102424344 is a wasteful number, since it uses less digits than its factorization.

21112102424344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639012803049 (or 2639012803045 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 21112102424344 its reverse (44342420121112), we get a palindrome (65454522545456).

The spelling of 21112102424344 in words is "twenty-one trillion, one hundred twelve billion, one hundred two million, four hundred twenty-four thousand, three hundred forty-four".