121231331100001 has 16 divisors (see below), whose sum is σ = 123156714384000. Its totient is φ = 119320770816000.

The previous prime is 121231331099947. The next prime is 121231331100029. The reversal of 121231331100001 is 100001133132121.

It is a cyclic number.

It is not a de Polignac number, because 121231331100001 - 2²⁹ = 121230794229089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121231331100701) 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, 1120787361 + ... + 1120895521.

It is an arithmetic number, because the mean of its divisors is an integer number (7697294649000).

Almost surely, 2^{121231331100001} is an apocalyptic number.

It is an amenable number.

121231331100001 is a deficient number, since it is larger than the sum of its proper divisors (1925383283999).

121231331100001 is a wasteful number, since it uses less digits than its factorization.

121231331100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176520.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 121231331100001 its reverse (100001133132121), we get a palindrome (221232464232122).

The spelling of 121231331100001 in words is "one hundred twenty-one trillion, two hundred thirty-one billion, three hundred thirty-one million, one hundred thousand, one".