202220011021121 has 4 divisors (see below), whose sum is σ = 202221761610672. Its totient is φ = 202218260431572.

The previous prime is 202220011021043. The next prime is 202220011021123. The reversal of 202220011021121 is 121120110022202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202220011021121 - 2⁴² = 197821964510017 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 202220011021121.

It is not an unprimeable number, because it can be changed into a prime (202220011021123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 875121491 + ... + 875352536.

It is an arithmetic number, because the mean of its divisors is an integer number (50555440402668).

Almost surely, 2^{202220011021121} is an apocalyptic number.

It is an amenable number.

202220011021121 is a deficient number, since it is larger than the sum of its proper divisors (1750589551).

202220011021121 is a wasteful number, since it uses less digits than its factorization.

202220011021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750589550.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 202220011021121 its reverse (121120110022202), we get a palindrome (323340121043323).

The spelling of 202220011021121 in words is "two hundred two trillion, two hundred twenty billion, eleven million, twenty-one thousand, one hundred twenty-one".