121221100311 has 16 divisors (see below), whose sum is σ = 163918402560. Its totient is φ = 79669124640.

The previous prime is 121221100267. The next prime is 121221100313. The reversal of 121221100311 is 113001122121.

It is not a de Polignac number, because 121221100311 - 2⁷ = 121221100183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221100313) 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, 4564770 + ... + 4591248.

It is an arithmetic number, because the mean of its divisors is an integer number (10244900160).

Almost surely, 2^121221100311 is an apocalyptic number.

121221100311 is a deficient number, since it is larger than the sum of its proper divisors (42697302249).

121221100311 is a wasteful number, since it uses less digits than its factorization.

121221100311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48046.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 121221100311 its reverse (113001122121), we get a palindrome (234222222432).

The spelling of 121221100311 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, three hundred eleven".