40013400013021 has 4 divisors (see below), whose sum is σ = 40014902777472. Its totient is φ = 40011897248572.

The previous prime is 40013400013019. The next prime is 40013400013109. The reversal of 40013400013021 is 12031000431004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40013400013021 - 2¹ = 40013400013019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40013400013021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40013400023021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751342285 + ... + 751395538.

It is an arithmetic number, because the mean of its divisors is an integer number (10003725694368).

Almost surely, 2^{40013400013021} is an apocalyptic number.

It is an amenable number.

40013400013021 is a deficient number, since it is larger than the sum of its proper divisors (1502764451).

40013400013021 is a wasteful number, since it uses less digits than its factorization.

40013400013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502764450.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 40013400013021 its reverse (12031000431004), we get a palindrome (52044400444025).

The spelling of 40013400013021 in words is "forty trillion, thirteen billion, four hundred million, thirteen thousand, twenty-one".