21021142022 has 16 divisors (see below), whose sum is σ = 33389696880. Its totient is φ = 9891360768.

The previous prime is 21021142007. The next prime is 21021142057. The reversal of 21021142022 is 22024112012.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 443129 + ... + 488267.

It is an arithmetic number, because the mean of its divisors is an integer number (2086856055).

Almost surely, 2^21021142022 is an apocalyptic number.

21021142022 is a deficient number, since it is larger than the sum of its proper divisors (12368554858).

21021142022 is a wasteful number, since it uses less digits than its factorization.

21021142022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58855.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21021142022 its reverse (22024112012), we get a palindrome (43045254034).

The spelling of 21021142022 in words is "twenty-one billion, twenty-one million, one hundred forty-two thousand, twenty-two".