21277020022 has 16 divisors (see below), whose sum is σ = 32490072000. Its totient is φ = 10447369480.

The previous prime is 21277020013. The next prime is 21277020043. The reversal of 21277020022 is 22002077212.

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, 21729 + ... + 207427.

It is an arithmetic number, because the mean of its divisors is an integer number (2030629500).

Almost surely, 2^21277020022 is an apocalyptic number.

21277020022 is a deficient number, since it is larger than the sum of its proper divisors (11213051978).

21277020022 is a wasteful number, since it uses less digits than its factorization.

21277020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186731.

The product of its (nonzero) digits is 1568, while the sum is 25.

Adding to 21277020022 its reverse (22002077212), we get a palindrome (43279097234).

The spelling of 21277020022 in words is "twenty-one billion, two hundred seventy-seven million, twenty thousand, twenty-two".