124221823172421 has 64 divisors (see below), whose sum is σ = 184743414352896. Its totient is φ = 73755098726400.

The previous prime is 124221823172407. The next prime is 124221823172441. The reversal of 124221823172421 is 124271328122421.

It is not a de Polignac number, because 124221823172421 - 2¹⁵ = 124221823139653 is a prime.

It is a super-2 number, since 2×124221823172421² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124221823172401) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 205519911 + ... + 206123451.

It is an arithmetic number, because the mean of its divisors is an integer number (2886615849264).

Almost surely, 2^{124221823172421} is an apocalyptic number.

It is an amenable number.

124221823172421 is a deficient number, since it is larger than the sum of its proper divisors (60521591180475).

124221823172421 is a wasteful number, since it uses less digits than its factorization.

124221823172421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605022.

The product of its digits is 172032, while the sum is 42.

The spelling of 124221823172421 in words is "one hundred twenty-four trillion, two hundred twenty-one billion, eight hundred twenty-three million, one hundred seventy-two thousand, four hundred twenty-one".