21023312202 has 12 divisors (see below), whose sum is σ = 45550509810. Its totient is φ = 7007770728.

The previous prime is 21023312201. The next prime is 21023312227. The reversal of 21023312202 is 20221332012.

21023312202 is a `hidden beast` number, since 210 + 233 + 1 + 220 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18073844721 + 2949467481 = 134439^2 + 54309^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1167961789 = 21023312202 / (2 + 1 + 0 + 2 + 3 + 3 + 1 + 2 + 2 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (21023312201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 583980877 + ... + 583980912.

Almost surely, 2^21023312202 is an apocalyptic number.

21023312202 is an abundant number, since it is smaller than the sum of its proper divisors (24527197608).

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

21023312202 is a wasteful number, since it uses less digits than its factorization.

21023312202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167961797 (or 1167961794 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21023312202 its reverse (20221332012), we get a palindrome (41244644214).

The spelling of 21023312202 in words is "twenty-one billion, twenty-three million, three hundred twelve thousand, two hundred two".