42120401231 has 2 divisors, whose sum is σ = 42120401232. Its totient is φ = 42120401230.

The previous prime is 42120401143. The next prime is 42120401317. The reversal of 42120401231 is 13210402124.

42120401231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42120401231 - 2²² = 42116206927 is a prime.

It is a super-2 number, since 2×42120401231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42120401131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060200615 + 21060200616.

It is an arithmetic number, because the mean of its divisors is an integer number (21060200616).

Almost surely, 2^42120401231 is an apocalyptic number.

42120401231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120401231 is an equidigital number, since it uses as much as digits as its factorization.

42120401231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 42120401231 its reverse (13210402124), we get a palindrome (55330803355).

The spelling of 42120401231 in words is "forty-two billion, one hundred twenty million, four hundred one thousand, two hundred thirty-one".