21211012022 has 16 divisors (see below), whose sum is σ = 33826260960. Its totient is φ = 9952992192.

The previous prime is 21211011973. The next prime is 21211012033. The reversal of 21211012022 is 22021011212.

It is a junction number, because it is equal to n+sod(n) for n = 21211011988 and 21211012006.

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, 4347647 + ... + 4352522.

It is an arithmetic number, because the mean of its divisors is an integer number (2114141310).

Almost surely, 2^21211012022 is an apocalyptic number.

21211012022 is a deficient number, since it is larger than the sum of its proper divisors (12615248938).

21211012022 is a wasteful number, since it uses less digits than its factorization.

21211012022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8700247.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21211012022 its reverse (22021011212), we get a palindrome (43232023234).

The spelling of 21211012022 in words is "twenty-one billion, two hundred eleven million, twelve thousand, twenty-two".