40015122021 has 24 divisors (see below), whose sum is σ = 66674073024. Its totient is φ = 22652081280.

The previous prime is 40015121989. The next prime is 40015122029. The reversal of 40015122021 is 12022151004.

It is not a de Polignac number, because 40015122021 - 2⁵ = 40015121989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40015121985 and 40015122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40015122029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2961300 + ... + 2974781.

It is an arithmetic number, because the mean of its divisors is an integer number (2778086376).

Almost surely, 2^40015122021 is an apocalyptic number.

It is an amenable number.

40015122021 is a deficient number, since it is larger than the sum of its proper divisors (26658951003).

40015122021 is a wasteful number, since it uses less digits than its factorization.

40015122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5936201 (or 5936198 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

Adding to 40015122021 its reverse (12022151004), we get a palindrome (52037273025).

The spelling of 40015122021 in words is "forty billion, fifteen million, one hundred twenty-two thousand, twenty-one".