121173253172 has 6 divisors (see below), whose sum is σ = 212053193058. Its totient is φ = 60586626584.

The previous prime is 121173253171. The next prime is 121173253183. The reversal of 121173253172 is 271352371121.

It can be written as a sum of positive squares in only one way, i.e., 120677032996 + 496220176 = 347386^2 + 22276^2 .

It is a super-3 number, since 3×121173253172³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121173253171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15146656643 + ... + 15146656650.

It is an arithmetic number, because the mean of its divisors is an integer number (35342198843).

Almost surely, 2^121173253172 is an apocalyptic number.

It is an amenable number.

121173253172 is a deficient number, since it is larger than the sum of its proper divisors (90879939886).

121173253172 is a wasteful number, since it uses less digits than its factorization.

121173253172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30293313297 (or 30293313295 counting only the distinct ones).

The product of its digits is 17640, while the sum is 35.

The spelling of 121173253172 in words is "one hundred twenty-one billion, one hundred seventy-three million, two hundred fifty-three thousand, one hundred seventy-two".