123022400021 has 16 divisors (see below), whose sum is σ = 132531896640. Its totient is φ = 113817312000.

The previous prime is 123022399987. The next prime is 123022400041. The reversal of 123022400021 is 120004220321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123022400021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123022400041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6936461 + ... + 6954173.

It is an arithmetic number, because the mean of its divisors is an integer number (8283243540).

Almost surely, 2^123022400021 is an apocalyptic number.

It is an amenable number.

123022400021 is a deficient number, since it is larger than the sum of its proper divisors (9509496619).

123022400021 is a wasteful number, since it uses less digits than its factorization.

123022400021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26276.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 123022400021 its reverse (120004220321), we get a palindrome (243026620342).

The spelling of 123022400021 in words is "one hundred twenty-three billion, twenty-two million, four hundred thousand, twenty-one".