21202120021022 has 32 divisors (see below), whose sum is σ = 34217254051200. Its totient is φ = 9822770905248.

The previous prime is 21202120021013. The next prime is 21202120021063. The reversal of 21202120021022 is 22012002120212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23560328 + ... + 24443675.

It is an arithmetic number, because the mean of its divisors is an integer number (1069289189100).

Almost surely, 2^{21202120021022} is an apocalyptic number.

21202120021022 is a deficient number, since it is larger than the sum of its proper divisors (13015134030178).

21202120021022 is a wasteful number, since it uses less digits than its factorization.

21202120021022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48004280.

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

Adding to 21202120021022 its reverse (22012002120212), we get a palindrome (43214122141234).

The spelling of 21202120021022 in words is "twenty-one trillion, two hundred two billion, one hundred twenty million, twenty-one thousand, twenty-two".