107172121 has 4 divisors (see below), whose sum is σ = 122482432. Its totient is φ = 91861812.

The previous prime is 107172113. The next prime is 107172127. The reversal of 107172121 is 121271701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 107172121 - 2³ = 107172113 is a prime.

It is a super-2 number, since 2×107172121² = 22971727039277282, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 107172121 parts by 14640 straight cuts.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 107172092 and 107172101.

It is not an unprimeable number, because it can be changed into a prime (107172127) 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, 7655145 + ... + 7655158.

It is an arithmetic number, because the mean of its divisors is an integer number (30620608).

Almost surely, 2^107172121 is an apocalyptic number.

It is an amenable number.

107172121 is a deficient number, since it is larger than the sum of its proper divisors (15310311).

107172121 is an equidigital number, since it uses as much as digits as its factorization.

107172121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15310310.

The product of its (nonzero) digits is 196, while the sum is 22.

The square root of 107172121 is about 10352.3968722224. The cubic root of 107172121 is about 475.0003634346. Note that the first 3 decimals are identical.

The spelling of 107172121 in words is "one hundred seven million, one hundred seventy-two thousand, one hundred twenty-one".