21202112020022 has 4 divisors (see below), whose sum is σ = 31803168030036. Its totient is φ = 10601056010010.

The previous prime is 21202112020013. The next prime is 21202112020043. The reversal of 21202112020022 is 22002021120212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21202112020022² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300528005004 + ... + 5300528005007.

It is an arithmetic number, because the mean of its divisors is an integer number (7950792007509).

Almost surely, 2^{21202112020022} is an apocalyptic number.

21202112020022 is a deficient number, since it is larger than the sum of its proper divisors (10601056010014).

21202112020022 is a wasteful number, since it uses less digits than its factorization.

21202112020022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10601056010013.

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

Adding to 21202112020022 its reverse (22002021120212), we get a palindrome (43204133140234).

The spelling of 21202112020022 in words is "twenty-one trillion, two hundred two billion, one hundred twelve million, twenty thousand, twenty-two".