124749533621 has 2 divisors, whose sum is σ = 124749533622. Its totient is φ = 124749533620.

The previous prime is 124749533567. The next prime is 124749533677. The reversal of 124749533621 is 126335947421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104232122500 + 20517411121 = 322850^2 + 143239^2 .

It is an emirp because it is prime and its reverse (126335947421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 124749533621 - 2³⁴ = 107569664437 is a prime.

It is a super-2 number, since 2×124749533621² (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 (124749530621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62374766810 + 62374766811.

It is an arithmetic number, because the mean of its divisors is an integer number (62374766811).

Almost surely, 2^124749533621 is an apocalyptic number.

It is an amenable number.

124749533621 is a deficient number, since it is larger than the sum of its proper divisors (1).

124749533621 is an equidigital number, since it uses as much as digits as its factorization.

124749533621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 47.

The spelling of 124749533621 in words is "one hundred twenty-four billion, seven hundred forty-nine million, five hundred thirty-three thousand, six hundred twenty-one".