124721476687129 has 27 divisors (see below), whose sum is σ = 153123894310527. Its totient is φ = 101276383961088.

The previous prime is 124721476687063. The next prime is 124721476687141. The reversal of 124721476687129 is 921786674127421.

The square root of 124721476687129 is 11167877.

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., 115396515144729 + 9324961542400 = 10742277^2 + 3053680^2 .

It is not a de Polignac number, because 124721476687129 - 2¹¹ = 124721476685081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (124721476687169) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1485285657 + ... + 1485369625.

Almost surely, 2^{124721476687129} is an apocalyptic number.

124721476687129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

124721476687129 is the 11167877-th square number.

124721476687129 is the 5583939-th centered octagonal number.

It is an amenable number.

124721476687129 is a deficient number, since it is larger than the sum of its proper divisors (28402417623398).

124721476687129 is an frugal number, since it uses more digits than its factorization.

124721476687129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167990 (or 83995 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 67.

The spelling of 124721476687129 in words is "one hundred twenty-four trillion, seven hundred twenty-one billion, four hundred seventy-six million, six hundred eighty-seven thousand, one hundred twenty-nine".