123422636421 has 12 divisors (see below), whose sum is σ = 203745304672. Its totient is φ = 70527220776.

The previous prime is 123422636383. The next prime is 123422636429. The reversal of 123422636421 is 124636224321.

123422636421 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 2 + 2 + 6 + 3 + 642 + 1 = 666.

It is not a de Polignac number, because 123422636421 - 2¹⁵ = 123422603653 is a prime.

It is a super-3 number, since 3×123422636421³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123422636429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 979544671 + ... + 979544796.

Almost surely, 2^123422636421 is an apocalyptic number.

It is an amenable number.

123422636421 is a deficient number, since it is larger than the sum of its proper divisors (80322668251).

123422636421 is a wasteful number, since it uses less digits than its factorization.

123422636421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959089480 (or 1959089477 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

The spelling of 123422636421 in words is "one hundred twenty-three billion, four hundred twenty-two million, six hundred thirty-six thousand, four hundred twenty-one".