101663431220 has 24 divisors (see below), whose sum is σ = 229915760424. Its totient is φ = 37537266816.

The previous prime is 101663431193. The next prime is 101663431241. The reversal of 101663431220 is 22134366101.

It can be written as a sum of positive squares in 4 ways, for example, as 2174916496 + 99488514724 = 46636^2 + 315418^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195506339 + ... + 195506858.

It is an arithmetic number, because the mean of its divisors is an integer number (9579823351).

Almost surely, 2^101663431220 is an apocalyptic number.

101663431220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101663431220 is an abundant number, since it is smaller than the sum of its proper divisors (128252329204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101663431220 is a wasteful number, since it uses less digits than its factorization.

101663431220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391013219 (or 391013217 counting only the distinct ones).

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

Adding to 101663431220 its reverse (22134366101), we get a palindrome (123797797321).

The spelling of 101663431220 in words is "one hundred one billion, six hundred sixty-three million, four hundred thirty-one thousand, two hundred twenty".