1631104433021 has 16 divisors (see below), whose sum is σ = 1928447740800. Its totient is φ = 1349845643328.

The previous prime is 1631104432883. The next prime is 1631104433027. The reversal of 1631104433021 is 1203344011361.

It is a happy number.

It is not a de Polignac number, because 1631104433021 - 2¹⁰ = 1631104431997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631104433027) 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, 11016146 + ... + 11163228.

It is an arithmetic number, because the mean of its divisors is an integer number (120527983800).

Almost surely, 2^{1631104433021} is an apocalyptic number.

It is an amenable number.

1631104433021 is a deficient number, since it is larger than the sum of its proper divisors (297343307779).

1631104433021 is a wasteful number, since it uses less digits than its factorization.

1631104433021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201748.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 1631104433021 its reverse (1203344011361), we get a palindrome (2834448444382).

The spelling of 1631104433021 in words is "one trillion, six hundred thirty-one billion, one hundred four million, four hundred thirty-three thousand, twenty-one".