21110031033 has 32 divisors (see below), whose sum is σ = 35759603712. Its totient is φ = 10775764800.

The previous prime is 21110031013. The next prime is 21110031037. The reversal of 21110031033 is 33013001112.

It is not a de Polignac number, because 21110031033 - 2⁵ = 21110031001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110031037) 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, 1238733 + ... + 1255658.

It is an arithmetic number, because the mean of its divisors is an integer number (1117487616).

Almost surely, 2^21110031033 is an apocalyptic number.

It is an amenable number.

21110031033 is a deficient number, since it is larger than the sum of its proper divisors (14649572679).

21110031033 is a wasteful number, since it uses less digits than its factorization.

21110031033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494445.

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 21110031033 its reverse (33013001112), we get a palindrome (54123032145).

The spelling of 21110031033 in words is "twenty-one billion, one hundred ten million, thirty-one thousand, thirty-three".