40001241321421 has 4 divisors (see below), whose sum is σ = 40014526359744. Its totient is φ = 39987956283100.

The previous prime is 40001241321367. The next prime is 40001241321449. The reversal of 40001241321421 is 12412314210004.

40001241321421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40001241321421 - 2³³ = 39992651386829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001241321451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6642514645 + ... + 6642520666.

It is an arithmetic number, because the mean of its divisors is an integer number (10003631589936).

Almost surely, 2^{40001241321421} is an apocalyptic number.

It is an amenable number.

40001241321421 is a deficient number, since it is larger than the sum of its proper divisors (13285038323).

40001241321421 is a wasteful number, since it uses less digits than its factorization.

40001241321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13285038322.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 40001241321421 its reverse (12412314210004), we get a palindrome (52413555531425).

The spelling of 40001241321421 in words is "forty trillion, one billion, two hundred forty-one million, three hundred twenty-one thousand, four hundred twenty-one".