21221203022 has 16 divisors (see below), whose sum is σ = 31946680752. Its totient is φ = 10572379200.

The previous prime is 21221203019. The next prime is 21221203027. The reversal of 21221203022 is 22030212212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221203027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611768 + ... + 645524.

It is an arithmetic number, because the mean of its divisors is an integer number (1996667547).

Almost surely, 2^21221203022 is an apocalyptic number.

21221203022 is a deficient number, since it is larger than the sum of its proper divisors (10725477730).

21221203022 is a wasteful number, since it uses less digits than its factorization.

21221203022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34883.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21221203022 its reverse (22030212212), we get a palindrome (43251415234).

The spelling of 21221203022 in words is "twenty-one billion, two hundred twenty-one million, two hundred three thousand, twenty-two".