121011122211 has 12 divisors (see below), whose sum is σ = 187690720392. Its totient is φ = 69149212608.

The previous prime is 121011122179. The next prime is 121011122269. The reversal of 121011122211 is 112221110121.

It is a happy number.

It is not a de Polignac number, because 121011122211 - 2⁵ = 121011122179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121011122291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411602310 + ... + 411602603.

It is an arithmetic number, because the mean of its divisors is an integer number (15640893366).

Almost surely, 2^121011122211 is an apocalyptic number.

121011122211 is a deficient number, since it is larger than the sum of its proper divisors (66679598181).

121011122211 is an equidigital number, since it uses as much as digits as its factorization.

121011122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823204930 (or 823204923 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 121011122211 its reverse (112221110121), we get a palindrome (233232232332).

The spelling of 121011122211 in words is "one hundred twenty-one billion, eleven million, one hundred twenty-two thousand, two hundred eleven".