124347964021 has 2 divisors, whose sum is σ = 124347964022. Its totient is φ = 124347964020.

The previous prime is 124347963979. The next prime is 124347964067. The reversal of 124347964021 is 120469743421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82662575121 + 41685388900 = 287511^2 + 204170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-124347964021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (124347964921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62173982010 + 62173982011.

It is an arithmetic number, because the mean of its divisors is an integer number (62173982011).

Almost surely, 2^124347964021 is an apocalyptic number.

It is an amenable number.

124347964021 is a deficient number, since it is larger than the sum of its proper divisors (1).

124347964021 is an equidigital number, since it uses as much as digits as its factorization.

124347964021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 43.

The spelling of 124347964021 in words is "one hundred twenty-four billion, three hundred forty-seven million, nine hundred sixty-four thousand, twenty-one".