21011233113 has 32 divisors (see below), whose sum is σ = 35494099200. Its totient is φ = 12169398528.

The previous prime is 21011233081. The next prime is 21011233151. The reversal of 21011233113 is 31133211012.

21011233113 is a `hidden beast` number, since 210 + 112 + 331 + 13 = 666.

It is not a de Polignac number, because 21011233113 - 2⁵ = 21011233081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21011233013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1754653 + ... + 1766586.

It is an arithmetic number, because the mean of its divisors is an integer number (1109190600).

Almost surely, 2^21011233113 is an apocalyptic number.

It is an amenable number.

21011233113 is a deficient number, since it is larger than the sum of its proper divisors (14482866087).

21011233113 is a wasteful number, since it uses less digits than its factorization.

21011233113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521278 (or 3521272 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21011233113 its reverse (31133211012), we get a palindrome (52144444125).

The spelling of 21011233113 in words is "twenty-one billion, eleven million, two hundred thirty-three thousand, one hundred thirteen".