101363431621 has 4 divisors (see below), whose sum is σ = 102009058732. Its totient is φ = 100717804512.

The previous prime is 101363431597. The next prime is 101363431643. The reversal of 101363431621 is 126134363101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38146386721 + 63217044900 = 195311^2 + 251430^2 .

It is a cyclic number.

It is not a de Polignac number, because 101363431621 - 2¹⁵ = 101363398853 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 (101363431681) 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, 322813320 + ... + 322813633.

It is an arithmetic number, because the mean of its divisors is an integer number (25502264683).

Almost surely, 2^101363431621 is an apocalyptic number.

It is an amenable number.

101363431621 is a deficient number, since it is larger than the sum of its proper divisors (645627111).

101363431621 is an equidigital number, since it uses as much as digits as its factorization.

101363431621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645627110.

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 101363431621 its reverse (126134363101), we get a palindrome (227497794722).

The spelling of 101363431621 in words is "one hundred one billion, three hundred sixty-three million, four hundred thirty-one thousand, six hundred twenty-one".