21123022302 has 24 divisors (see below), whose sum is σ = 47756399184. Its totient is φ = 6734876544.

The previous prime is 21123022301. The next prime is 21123022307. The reversal of 21123022302 is 20322032112.

21123022302 is a `hidden beast` number, since 211 + 230 + 223 + 0 + 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 (21123022301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25510483 + ... + 25511310.

It is an arithmetic number, because the mean of its divisors is an integer number (1989849966).

Almost surely, 2^21123022302 is an apocalyptic number.

21123022302 is an abundant number, since it is smaller than the sum of its proper divisors (26633376882).

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

21123022302 is a wasteful number, since it uses less digits than its factorization.

21123022302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51021824 (or 51021821 counting only the distinct ones).

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

Adding to 21123022302 its reverse (20322032112), we get a palindrome (41445054414).

The spelling of 21123022302 in words is "twenty-one billion, one hundred twenty-three million, twenty-two thousand, three hundred two".