124621617181 has 2 divisors, whose sum is σ = 124621617182. Its totient is φ = 124621617180.

The previous prime is 124621617091. The next prime is 124621617203. The reversal of 124621617181 is 181716126421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118590696900 + 6030920281 = 344370^2 + 77659^2 .

It is a cyclic number.

It is not a de Polignac number, because 124621617181 - 2¹⁵ = 124621584413 is a prime.

It is a super-2 number, since 2×124621617181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124621617881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62310808590 + 62310808591.

It is an arithmetic number, because the mean of its divisors is an integer number (62310808591).

Almost surely, 2^124621617181 is an apocalyptic number.

It is an amenable number.

124621617181 is a deficient number, since it is larger than the sum of its proper divisors (1).

124621617181 is an equidigital number, since it uses as much as digits as its factorization.

124621617181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 40.

The spelling of 124621617181 in words is "one hundred twenty-four billion, six hundred twenty-one million, six hundred seventeen thousand, one hundred eighty-one".