55701192121 has 9 divisors (see below), whose sum is σ = 59174732911. Its totient is φ = 52420875232.

The previous prime is 55701192097. The next prime is 55701192137. The reversal of 55701192121 is 12129110755.

It is a happy number.

The square root of 55701192121 is 236011.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 43365980025 + 12335212096 = 208245^2 + 111064^2 .

It is not a de Polignac number, because 55701192121 - 2⁷ = 55701191993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55701192161) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4005246 + ... + 4019128.

Almost surely, 2^55701192121 is an apocalyptic number.

55701192121 is the 236011-st square number.

55701192121 is the 118006-th centered octagonal number.

It is an amenable number.

55701192121 is a deficient number, since it is larger than the sum of its proper divisors (3473540790).

55701192121 is an frugal number, since it uses more digits than its factorization.

55701192121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27800 (or 13900 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 34.

The spelling of 55701192121 in words is "fifty-five billion, seven hundred one million, one hundred ninety-two thousand, one hundred twenty-one".