124621617091 has 2 divisors, whose sum is σ = 124621617092. Its totient is φ = 124621617090.

The previous prime is 124621617079. The next prime is 124621617181. The reversal of 124621617091 is 190716126421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 124621617091 - 2⁵ = 124621617059 is a prime.

It is not a weakly prime, because it can be changed into another prime (124621617011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62310808545 + 62310808546.

It is an arithmetic number, because the mean of its divisors is an integer number (62310808546).

Almost surely, 2^124621617091 is an apocalyptic number.

124621617091 is a deficient number, since it is larger than the sum of its proper divisors (1).

124621617091 is an equidigital number, since it uses as much as digits as its factorization.

124621617091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 124621617091 in words is "one hundred twenty-four billion, six hundred twenty-one million, six hundred seventeen thousand, ninety-one".