121173253173 has 24 divisors (see below), whose sum is σ = 200439485376. Its totient is φ = 69100819200.

The previous prime is 121173253171. The next prime is 121173253183. The reversal of 121173253173 is 371352371121.

121173253173 is a `hidden beast` number, since 1 + 2 + 1 + 17 + 325 + 317 + 3 = 666.

It is not a de Polignac number, because 121173253173 - 2¹ = 121173253171 is a prime.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1927708 + ... + 1989573.

It is an arithmetic number, because the mean of its divisors is an integer number (8351645224).

Almost surely, 2^121173253173 is an apocalyptic number.

It is an amenable number.

121173253173 is a deficient number, since it is larger than the sum of its proper divisors (79266232203).

121173253173 is a wasteful number, since it uses less digits than its factorization.

121173253173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3917785 (or 3917782 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

It can be divided in two parts, 12117 and 3253173, that added together give a triangular number (3265290 = T₂₅₅₅).

The spelling of 121173253173 in words is "one hundred twenty-one billion, one hundred seventy-three million, two hundred fifty-three thousand, one hundred seventy-three".