21012022022 has 64 divisors (see below), whose sum is σ = 33901314048. Its totient is φ = 9750240000.

The previous prime is 21012021983. The next prime is 21012022027. The reversal of 21012022022 is 22022021012.

It is a junction number, because it is equal to n+sod(n) for n = 21012021988 and 21012022006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012022027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57253283 + ... + 57253649.

It is an arithmetic number, because the mean of its divisors is an integer number (529708032).

Almost surely, 2^21012022022 is an apocalyptic number.

21012022022 is a deficient number, since it is larger than the sum of its proper divisors (12889292026).

21012022022 is a wasteful number, since it uses less digits than its factorization.

21012022022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21012022022 its reverse (22022021012), we get a palindrome (43034043034).

The spelling of 21012022022 in words is "twenty-one billion, twelve million, twenty-two thousand, twenty-two".