21233122112 has 56 divisors (see below), whose sum is σ = 42576841440. Its totient is φ = 10505664000.

The previous prime is 21233122103. The next prime is 21233122121. The reversal of 21233122112 is 21122133212.

It is an interprime number because it is at equal distance from previous prime (21233122103) and next prime (21233122121).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2517839 + ... + 2526257.

It is an arithmetic number, because the mean of its divisors is an integer number (760300740).

Almost surely, 2^21233122112 is an apocalyptic number.

It is an amenable number.

21233122112 is an abundant number, since it is smaller than the sum of its proper divisors (21343719328).

21233122112 is a wasteful number, since it uses less digits than its factorization.

21233122112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8839 (or 8829 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 21233122112 its reverse (21122133212), we get a palindrome (42355255324).

The spelling of 21233122112 in words is "twenty-one billion, two hundred thirty-three million, one hundred twenty-two thousand, one hundred twelve".