172234130121 has 9 divisors (see below), whose sum is σ = 248784430791. Its totient is φ = 114821923392.

The previous prime is 172234130119. The next prime is 172234130129. The reversal of 172234130121 is 121031432271.

The square root of 172234130121 is 415011.

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

172234130121 is a `hidden beast` number, since 1 + 7 + 223 + 413 + 0 + 1 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27329049225 + 144905080896 = 165315^2 + 380664^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 172234130121 - 2¹ = 172234130119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172234130129) 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, 1175865 + ... + 1314201.

Almost surely, 2^172234130121 is an apocalyptic number.

172234130121 is the 415011-st square number.

172234130121 is the 207506-th centered octagonal number.

It is an amenable number.

172234130121 is a deficient number, since it is larger than the sum of its proper divisors (76550300670).

172234130121 is an frugal number, since it uses more digits than its factorization.

172234130121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276680 (or 138340 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 172234130121 its reverse (121031432271), we get a palindrome (293265562392).

The spelling of 172234130121 in words is "one hundred seventy-two billion, two hundred thirty-four million, one hundred thirty thousand, one hundred twenty-one".