3131441401421 has 4 divisors (see below), whose sum is σ = 3131455252032. Its totient is φ = 3131427550812.

The previous prime is 3131441401397. The next prime is 3131441401423. The reversal of 3131441401421 is 1241041441313.

It is a happy number.

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 3131441401421 - 2⁶ = 3131441401357 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 (3131441401423) 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, 6580451 + ... + 7040256.

It is an arithmetic number, because the mean of its divisors is an integer number (782863813008).

Almost surely, 2^{3131441401421} is an apocalyptic number.

It is an amenable number.

3131441401421 is a deficient number, since it is larger than the sum of its proper divisors (13850611).

3131441401421 is a wasteful number, since it uses less digits than its factorization.

3131441401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13850610.

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 3131441401421 its reverse (1241041441313), we get a palindrome (4372482842734).

The spelling of 3131441401421 in words is "three trillion, one hundred thirty-one billion, four hundred forty-one million, four hundred one thousand, four hundred twenty-one".