21112707212 has 12 divisors (see below), whose sum is σ = 37108580880. Its totient is φ = 10510255536.

The previous prime is 21112707197. The next prime is 21112707227. The reversal of 21112707212 is 21270721112.

It is an interprime number because it is at equal distance from previous prime (21112707197) and next prime (21112707227).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11523488 + ... + 11525319.

It is an arithmetic number, because the mean of its divisors is an integer number (3092381740).

Almost surely, 2^21112707212 is an apocalyptic number.

It is an amenable number.

21112707212 is a deficient number, since it is larger than the sum of its proper divisors (15995873668).

21112707212 is a wasteful number, since it uses less digits than its factorization.

21112707212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23049040 (or 23049038 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 26.

The spelling of 21112707212 in words is "twenty-one billion, one hundred twelve million, seven hundred seven thousand, two hundred twelve".