631104132421 has 16 divisors (see below), whose sum is σ = 738742871680. Its totient is φ = 527983790400.

The previous prime is 631104132413. The next prime is 631104132431. The reversal of 631104132421 is 124231401136.

631104132421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 631104132421 - 2³ = 631104132413 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 631104132421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631104132431) 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, 6121530 + ... + 6223771.

It is an arithmetic number, because the mean of its divisors is an integer number (46171429480).

Almost surely, 2^631104132421 is an apocalyptic number.

It is an amenable number.

631104132421 is a deficient number, since it is larger than the sum of its proper divisors (107638739259).

631104132421 is a wasteful number, since it uses less digits than its factorization.

631104132421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12345484.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 631104132421 its reverse (124231401136), we get a palindrome (755335533557).

The spelling of 631104132421 in words is "six hundred thirty-one billion, one hundred four million, one hundred thirty-two thousand, four hundred twenty-one".