124754747021 has 2 divisors, whose sum is σ = 124754747022. Its totient is φ = 124754747020.

The previous prime is 124754747009. The next prime is 124754747063. The reversal of 124754747021 is 120747457421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118257580996 + 6497166025 = 343886^2 + 80605^2 .

It is a cyclic number.

It is not a de Polignac number, because 124754747021 - 2⁶ = 124754746957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124754743021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62377373510 + 62377373511.

It is an arithmetic number, because the mean of its divisors is an integer number (62377373511).

Almost surely, 2^124754747021 is an apocalyptic number.

It is an amenable number.

124754747021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124754747021 is an equidigital number, since it uses as much as digits as its factorization.

124754747021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 439040, while the sum is 44.

The spelling of 124754747021 in words is "one hundred twenty-four billion, seven hundred fifty-four million, seven hundred forty-seven thousand, twenty-one".