21033122031 has 6 divisors (see below), whose sum is σ = 30381176280. Its totient is φ = 14022081348.

The previous prime is 21033122023. The next prime is 21033122053. The reversal of 21033122031 is 13022133012.

It is not a de Polignac number, because 21033122031 - 2³ = 21033122023 is a prime.

It is a super-2 number, since 2×21033122031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21033121995 and 21033122013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033122081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1168506771 + ... + 1168506788.

It is an arithmetic number, because the mean of its divisors is an integer number (5063529380).

Almost surely, 2^21033122031 is an apocalyptic number.

21033122031 is a deficient number, since it is larger than the sum of its proper divisors (9348054249).

21033122031 is a wasteful number, since it uses less digits than its factorization.

21033122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337013565 (or 2337013562 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21033122031 its reverse (13022133012), we get a palindrome (34055255043).

The spelling of 21033122031 in words is "twenty-one billion, thirty-three million, one hundred twenty-two thousand, thirty-one".