40400121412 has 24 divisors (see below), whose sum is σ = 81114655104. Its totient is φ = 17246963712.

The previous prime is 40400121379. The next prime is 40400121431. The reversal of 40400121412 is 21412100404.

It is a self number, because there is not a number n which added to its sum of digits gives 40400121412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2799928 + ... + 2814319.

It is an arithmetic number, because the mean of its divisors is an integer number (3379777296).

Almost surely, 2^40400121412 is an apocalyptic number.

It is an amenable number.

40400121412 is an abundant number, since it is smaller than the sum of its proper divisors (40714533692).

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

40400121412 is a wasteful number, since it uses less digits than its factorization.

40400121412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614515 (or 5614513 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 40400121412 its reverse (21412100404), we get a palindrome (61812221816).

The spelling of 40400121412 in words is "forty billion, four hundred million, one hundred twenty-one thousand, four hundred twelve".