4020120631 has 2 divisors, whose sum is σ = 4020120632. Its totient is φ = 4020120630.

The previous prime is 4020120623. The next prime is 4020120661. The reversal of 4020120631 is 1360210204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4020120631 - 2³ = 4020120623 is a prime.

It is a super-2 number, since 2×4020120631² = 32322739775583676322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4020120599 and 4020120608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4020120661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010060315 + 2010060316.

It is an arithmetic number, because the mean of its divisors is an integer number (2010060316).

Almost surely, 2^4020120631 is an apocalyptic number.

4020120631 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020120631 is an equidigital number, since it uses as much as digits as its factorization.

4020120631 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 4020120631 is about 63404.4212259681. The cubic root of 4020120631 is about 1590.0582274999.

Adding to 4020120631 its reverse (1360210204), we get a palindrome (5380330835).

The spelling of 4020120631 in words is "four billion, twenty million, one hundred twenty thousand, six hundred thirty-one".