202220121121021 has 16 divisors (see below), whose sum is σ = 214143719746176. Its totient is φ = 190299668852736.

The previous prime is 202220121120991. The next prime is 202220121121033. The reversal of 202220121121021 is 120121121022202.

It is not a de Polignac number, because 202220121121021 - 2⁷ = 202220121120893 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202220121121021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202220121121091) 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, 7990666650 + ... + 7990691956.

It is an arithmetic number, because the mean of its divisors is an integer number (13383982484136).

Almost surely, 2^{202220121121021} is an apocalyptic number.

It is an amenable number.

202220121121021 is a deficient number, since it is larger than the sum of its proper divisors (11923598625155).

202220121121021 is a wasteful number, since it uses less digits than its factorization.

202220121121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68868.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 202220121121021 its reverse (120121121022202), we get a palindrome (322341242143223).

The spelling of 202220121121021 in words is "two hundred two trillion, two hundred twenty billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-one".