21011313112 has 32 divisors (see below), whose sum is σ = 39944916000. Its totient is φ = 10360272384.

The previous prime is 21011313067. The next prime is 21011313151. The reversal of 21011313112 is 21131311012.

It is a happy number.

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, 121498 + ... + 238294.

It is an arithmetic number, because the mean of its divisors is an integer number (1248278625).

Almost surely, 2^21011313112 is an apocalyptic number.

It is an amenable number.

21011313112 is a deficient number, since it is larger than the sum of its proper divisors (18933602888).

21011313112 is a wasteful number, since it uses less digits than its factorization.

21011313112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117115 (or 117111 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 21011313112 its reverse (21131311012), we get a palindrome (42142624124).

The spelling of 21011313112 in words is "twenty-one billion, eleven million, three hundred thirteen thousand, one hundred twelve".