121316116172 has 12 divisors (see below), whose sum is σ = 216308924496. Its totient is φ = 59513566320.

The previous prime is 121316116171. The next prime is 121316116217. The reversal of 121316116172 is 271611613121.

It is not an unprimeable number, because it can be changed into a prime (121316116171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286122704 + ... + 286123127.

It is an arithmetic number, because the mean of its divisors is an integer number (18025743708).

Almost surely, 2^121316116172 is an apocalyptic number.

It is an amenable number.

121316116172 is a deficient number, since it is larger than the sum of its proper divisors (94992808324).

121316116172 is a wasteful number, since it uses less digits than its factorization.

121316116172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572245888 (or 572245886 counting only the distinct ones).

The product of its digits is 3024, while the sum is 32.

Adding to 121316116172 its reverse (271611613121), we get a palindrome (392927729293).

The spelling of 121316116172 in words is "one hundred twenty-one billion, three hundred sixteen million, one hundred sixteen thousand, one hundred seventy-two".