21210303121022 has 16 divisors (see below), whose sum is σ = 31999624832160. Its totient is φ = 10543762528992.

The previous prime is 21210303120989. The next prime is 21210303121027. The reversal of 21210303121022 is 22012130301212.

It is a junction number, because it is equal to n+sod(n) for n = 21210303120985 and 21210303121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210303121027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67423448 + ... + 67737300.

It is an arithmetic number, because the mean of its divisors is an integer number (1999976552010).

Almost surely, 2^{21210303121022} is an apocalyptic number.

21210303121022 is a deficient number, since it is larger than the sum of its proper divisors (10789321711138).

21210303121022 is a wasteful number, since it uses less digits than its factorization.

21210303121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509347.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21210303121022 its reverse (22012130301212), we get a palindrome (43222433422234).

The spelling of 21210303121022 in words is "twenty-one trillion, two hundred ten billion, three hundred three million, one hundred twenty-one thousand, twenty-two".