40401252120 has 64 divisors (see below), whose sum is σ = 122910877440. Its totient is φ = 10621923200.

The previous prime is 40401252109. The next prime is 40401252137. The reversal of 40401252120 is 2125210404.

It is a super-2 number, since 2×40401252120² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2362446 + ... + 2379485.

It is an arithmetic number, because the mean of its divisors is an integer number (1920482460).

Almost surely, 2^40401252120 is an apocalyptic number.

40401252120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40401252120 is an abundant number, since it is smaller than the sum of its proper divisors (82509625320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40401252120 is a wasteful number, since it uses less digits than its factorization.

40401252120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4742016 (or 4742012 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 40401252120 its reverse (2125210404), we get a palindrome (42526462524).

The spelling of 40401252120 in words is "forty billion, four hundred one million, two hundred fifty-two thousand, one hundred twenty".