42120023401 has 4 divisors (see below), whose sum is σ = 42162872832. Its totient is φ = 42077173972.

The previous prime is 42120023377. The next prime is 42120023431. The reversal of 42120023401 is 10432002124.

42120023401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42120023401 - 2⁵ = 42120023369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42120023431) 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, 21423241 + ... + 21425206.

It is an arithmetic number, because the mean of its divisors is an integer number (10540718208).

Almost surely, 2^42120023401 is an apocalyptic number.

It is an amenable number.

42120023401 is a deficient number, since it is larger than the sum of its proper divisors (42849431).

42120023401 is an equidigital number, since it uses as much as digits as its factorization.

42120023401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42849430.

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

Adding to 42120023401 its reverse (10432002124), we get a palindrome (52552025525).

The spelling of 42120023401 in words is "forty-two billion, one hundred twenty million, twenty-three thousand, four hundred one".