21011112412 has 6 divisors (see below), whose sum is σ = 36769446728. Its totient is φ = 10505556204.

The previous prime is 21011112383. The next prime is 21011112427. The reversal of 21011112412 is 21421111012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2626389048 + ... + 2626389055.

Almost surely, 2^21011112412 is an apocalyptic number.

It is an amenable number.

21011112412 is a deficient number, since it is larger than the sum of its proper divisors (15758334316).

21011112412 is a wasteful number, since it uses less digits than its factorization.

21011112412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252778107 (or 5252778105 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011112412 its reverse (21421111012), we get a palindrome (42432223424).

The spelling of 21011112412 in words is "twenty-one billion, eleven million, one hundred twelve thousand, four hundred twelve".