21031123302 has 36 divisors (see below), whose sum is σ = 53007017076. Its totient is φ = 6008892120.

The previous prime is 21031123301. The next prime is 21031123319. The reversal of 21031123302 is 20332113012.

21031123302 is a `hidden beast` number, since 21 + 0 + 311 + 2 + 330 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031123301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11921524 + ... + 11923287.

It is an arithmetic number, because the mean of its divisors is an integer number (1472417141).

Almost surely, 2^21031123302 is an apocalyptic number.

21031123302 is an abundant number, since it is smaller than the sum of its proper divisors (31975893774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21031123302 is a wasteful number, since it uses less digits than its factorization.

21031123302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23844833 (or 23844823 counting only the distinct ones).

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

Adding to 21031123302 its reverse (20332113012), we get a palindrome (41363236314).

The spelling of 21031123302 in words is "twenty-one billion, thirty-one million, one hundred twenty-three thousand, three hundred two".