21021212012 has 12 divisors (see below), whose sum is σ = 37151350656. Its totient is φ = 10406540400.

The previous prime is 21021211987. The next prime is 21021212041.

21021212012 is nontrivially palindromic in base 10.

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, 26015948 + ... + 26016755.

It is an arithmetic number, because the mean of its divisors is an integer number (3095945888).

Almost surely, 2^21021212012 is an apocalyptic number.

It is an amenable number.

21021212012 is a deficient number, since it is larger than the sum of its proper divisors (16130138644).

21021212012 is a wasteful number, since it uses less digits than its factorization.

21021212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52032808 (or 52032806 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The spelling of 21021212012 in words is "twenty-one billion, twenty-one million, two hundred twelve thousand, twelve".