121321200311 has 16 divisors (see below), whose sum is σ = 122464892928. Its totient is φ = 120184495200.

The previous prime is 121321200307. The next prime is 121321200313. The reversal of 121321200311 is 113002123121.

It is a cyclic number.

It is not a de Polignac number, because 121321200311 - 2² = 121321200307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121321200311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321200313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43467326 + ... + 43470116.

It is an arithmetic number, because the mean of its divisors is an integer number (7654055808).

Almost surely, 2^121321200311 is an apocalyptic number.

121321200311 is a deficient number, since it is larger than the sum of its proper divisors (1143692617).

121321200311 is a wasteful number, since it uses less digits than its factorization.

121321200311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3902.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 121321200311 its reverse (113002123121), we get a palindrome (234323323432).

The spelling of 121321200311 in words is "one hundred twenty-one billion, three hundred twenty-one million, two hundred thousand, three hundred eleven".