121100031321 has 24 divisors (see below), whose sum is σ = 176027985120. Its totient is φ = 73846813824.

The previous prime is 121100031281. The next prime is 121100031337. The reversal of 121100031321 is 123130001121.

It is a happy number.

It is not a de Polignac number, because 121100031321 - 2⁶ = 121100031257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121100031321.

It is not an unprimeable number, because it can be changed into a prime (121100031361) 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, 1215180 + ... + 1311053.

It is an arithmetic number, because the mean of its divisors is an integer number (7334499380).

Almost surely, 2^121100031321 is an apocalyptic number.

It is an amenable number.

121100031321 is a deficient number, since it is larger than the sum of its proper divisors (54927953799).

121100031321 is a wasteful number, since it uses less digits than its factorization.

121100031321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526313 (or 2526284 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 121100031321 its reverse (123130001121), we get a palindrome (244230032442).

The spelling of 121100031321 in words is "one hundred twenty-one billion, one hundred million, thirty-one thousand, three hundred twenty-one".