121123311321 has 32 divisors (see below), whose sum is σ = 174160650240. Its totient is φ = 74658355200.

The previous prime is 121123311289. The next prime is 121123311329. The reversal of 121123311321 is 123113321121.

It is not a de Polignac number, because 121123311321 - 2⁵ = 121123311289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (121123311329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1804441 + ... + 1870361.

It is an arithmetic number, because the mean of its divisors is an integer number (5442520320).

Almost surely, 2^121123311321 is an apocalyptic number.

It is an amenable number.

121123311321 is a deficient number, since it is larger than the sum of its proper divisors (53037338919).

121123311321 is a wasteful number, since it uses less digits than its factorization.

121123311321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66837.

The product of its digits is 216, while the sum is 21.

Adding to 121123311321 its reverse (123113321121), we get a palindrome (244236632442).

The spelling of 121123311321 in words is "one hundred twenty-one billion, one hundred twenty-three million, three hundred eleven thousand, three hundred twenty-one".