21012012202022 has 32 divisors (see below), whose sum is σ = 34823497895424. Its totient is φ = 9457950902400.

The previous prime is 21012012202021. The next prime is 21012012202031. The reversal of 21012012202022 is 22020221021012.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012012202021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66022697 + ... + 66340187.

It is an arithmetic number, because the mean of its divisors is an integer number (1088234309232).

Almost surely, 2^{21012012202022} is an apocalyptic number.

21012012202022 is a deficient number, since it is larger than the sum of its proper divisors (13811485693402).

21012012202022 is a wasteful number, since it uses less digits than its factorization.

21012012202022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402164.

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

Adding to 21012012202022 its reverse (22020221021012), we get a palindrome (43032233223034).

The spelling of 21012012202022 in words is "twenty-one trillion, twelve billion, twelve million, two hundred two thousand, twenty-two".