121121022220211 has 16 divisors (see below), whose sum is σ = 137370854023200. Its totient is φ = 105867395083008.

The previous prime is 121121022220189. The next prime is 121121022220229. The reversal of 121121022220211 is 112022220121121.

It is not a de Polignac number, because 121121022220211 - 2²² = 121121018025907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121022223211) 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, 120338786 + ... + 121341111.

It is an arithmetic number, because the mean of its divisors is an integer number (8585678376450).

Almost surely, 2^{121121022220211} is an apocalyptic number.

121121022220211 is a deficient number, since it is larger than the sum of its proper divisors (16249831802989).

121121022220211 is a wasteful number, since it uses less digits than its factorization.

121121022220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241681958.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121121022220211 its reverse (112022220121121), we get a palindrome (233143242341332).

The spelling of 121121022220211 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty thousand, two hundred eleven".