123401000021 has 8 divisors (see below), whose sum is σ = 132896646624. Its totient is φ = 113905819440.

The previous prime is 123400999991. The next prime is 123401000027. The reversal of 123401000021 is 120000104321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123401000021 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 (123401000027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 593966 + ... + 774336.

It is an arithmetic number, because the mean of its divisors is an integer number (16612080828).

Almost surely, 2^123401000021 is an apocalyptic number.

It is an amenable number.

123401000021 is a deficient number, since it is larger than the sum of its proper divisors (9495646603).

123401000021 is a wasteful number, since it uses less digits than its factorization.

123401000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233011.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 123401000021 its reverse (120000104321), we get a palindrome (243401104342).

The spelling of 123401000021 in words is "one hundred twenty-three billion, four hundred one million, twenty-one", and thus it is an aban number.