40002012420321 has 16 divisors (see below), whose sum is σ = 61727035443200. Its totient is φ = 22568947332048.

The previous prime is 40002012420311. The next prime is 40002012420343. The reversal of 40002012420321 is 12302421020004.

It is not a de Polignac number, because 40002012420321 - 2³⁸ = 39727134513377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40002012420311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12056059951 + ... + 12056063268.

It is an arithmetic number, because the mean of its divisors is an integer number (3857939715200).

Almost surely, 2^{40002012420321} is an apocalyptic number.

It is an amenable number.

40002012420321 is a deficient number, since it is larger than the sum of its proper divisors (21725023022879).

40002012420321 is a wasteful number, since it uses less digits than its factorization.

40002012420321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24112123308.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 40002012420321 its reverse (12302421020004), we get a palindrome (52304433440325).

The spelling of 40002012420321 in words is "forty trillion, two billion, twelve million, four hundred twenty thousand, three hundred twenty-one".