121123211211 has 24 divisors (see below), whose sum is σ = 179931801504. Its totient is φ = 78458181120.

The previous prime is 121123211161. The next prime is 121123211213. The reversal of 121123211211 is 112112321121.

It is a happy number.

121123211211 is a `hidden beast` number, since 1 + 211 + 232 + 11 + 211 = 666.

It is not a de Polignac number, because 121123211211 - 2⁶ = 121123211147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121123211213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8070 + ... + 492251.

It is an arithmetic number, because the mean of its divisors is an integer number (7497158396).

Almost surely, 2^121123211211 is an apocalyptic number.

121123211211 is a deficient number, since it is larger than the sum of its proper divisors (58808590293).

121123211211 is a wasteful number, since it uses less digits than its factorization.

121123211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501091 (or 501088 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 121123211211 its reverse (112112321121), we get a palindrome (233235532332).

The spelling of 121123211211 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred eleven thousand, two hundred eleven".