40012121340 has 48 divisors (see below), whose sum is σ = 124482156960. Its totient is φ = 10669898880.

The previous prime is 40012121339. The next prime is 40012121399. The reversal of 40012121340 is 4312121004.

40012121340 is a `hidden beast` number, since 400 + 1 + 212 + 13 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 37047721 + ... + 37048800.

It is an arithmetic number, because the mean of its divisors is an integer number (2593378270).

Almost surely, 2^40012121340 is an apocalyptic number.

It is an amenable number.

40012121340 is an abundant number, since it is smaller than the sum of its proper divisors (84470035620).

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

40012121340 is a wasteful number, since it uses less digits than its factorization.

40012121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74096539 (or 74096531 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 40012121340 its reverse (4312121004), we get a palindrome (44324242344).

The spelling of 40012121340 in words is "forty billion, twelve million, one hundred twenty-one thousand, three hundred forty".