120023400421 has 4 divisors (see below), whose sum is σ = 120087346572. Its totient is φ = 119959454272.

The previous prime is 120023400403. The next prime is 120023400473. The reversal of 120023400421 is 124004320021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88855263396 + 31168137025 = 298086^2 + 176545^2 .

It is a cyclic number.

It is not a de Polignac number, because 120023400421 - 2¹⁷ = 120023269349 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 (120023404421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31970260 + ... + 31974013.

It is an arithmetic number, because the mean of its divisors is an integer number (30021836643).

Almost surely, 2^120023400421 is an apocalyptic number.

It is an amenable number.

120023400421 is a deficient number, since it is larger than the sum of its proper divisors (63946151).

120023400421 is an equidigital number, since it uses as much as digits as its factorization.

120023400421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63946150.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 120023400421 its reverse (124004320021), we get a palindrome (244027720442).

The spelling of 120023400421 in words is "one hundred twenty billion, twenty-three million, four hundred thousand, four hundred twenty-one".