101231131021 has 8 divisors (see below), whose sum is σ = 108134453304. Its totient is φ = 94433203200.

The previous prime is 101231131003. The next prime is 101231131031. The reversal of 101231131021 is 120131132101.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18154598121 + 83076532900 = 134739^2 + 288230^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101231131021 - 2²¹ = 101229033869 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101231130986 and 101231131004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101231131031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26346630 + ... + 26350471.

It is an arithmetic number, because the mean of its divisors is an integer number (13516806663).

Almost surely, 2^101231131021 is an apocalyptic number.

It is an amenable number.

101231131021 is a deficient number, since it is larger than the sum of its proper divisors (6903322283).

101231131021 is a wasteful number, since it uses less digits than its factorization.

101231131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52697231.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 101231131021 its reverse (120131132101), we get a palindrome (221362263122).

The spelling of 101231131021 in words is "one hundred one billion, two hundred thirty-one million, one hundred thirty-one thousand, twenty-one".