21321203022 has 64 divisors (see below), whose sum is σ = 55469836800. Its totient is φ = 5943188160.

The previous prime is 21321203017. The next prime is 21321203107. The reversal of 21321203022 is 22030212312.

21321203022 is a `hidden beast` number, since 21 + 321 + 20 + 302 + 2 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 21321202986 and 21321203004.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 672372 + ... + 703367.

It is an arithmetic number, because the mean of its divisors is an integer number (866716200).

Almost surely, 2^21321203022 is an apocalyptic number.

21321203022 is an abundant number, since it is smaller than the sum of its proper divisors (34148633778).

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

21321203022 is a wasteful number, since it uses less digits than its factorization.

21321203022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375798 (or 1375792 counting only the distinct ones).

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

Adding to 21321203022 its reverse (22030212312), we get a palindrome (43351415334).

The spelling of 21321203022 in words is "twenty-one billion, three hundred twenty-one million, two hundred three thousand, twenty-two".