120420631 has 2 divisors, whose sum is σ = 120420632. Its totient is φ = 120420630.

The previous prime is 120420623. The next prime is 120420637. The reversal of 120420631 is 136024021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120420631 - 2³ = 120420623 is a prime.

It is a super-2 number, since 2×120420631² = 29002256740876322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120420599 and 120420608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120420637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60210315 + 60210316.

It is an arithmetic number, because the mean of its divisors is an integer number (60210316).

Almost surely, 2^120420631 is an apocalyptic number.

120420631 is a deficient number, since it is larger than the sum of its proper divisors (1).

120420631 is an equidigital number, since it uses as much as digits as its factorization.

120420631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 120420631 is about 10973.6334456733. The cubic root of 120420631 is about 493.8180568262.

Adding to 120420631 its reverse (136024021), we get a palindrome (256444652).

The spelling of 120420631 in words is "one hundred twenty million, four hundred twenty thousand, six hundred thirty-one".