101131231021 has 4 divisors (see below), whose sum is σ = 101534144544. Its totient is φ = 100728317500.

The previous prime is 101131230953. The next prime is 101131231039. The reversal of 101131231021 is 120132131101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120132131101 = 281747 ⋅426383.

It is a cyclic number.

It is not a de Polignac number, because 101131231021 - 2¹⁵ = 101131198253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101131230986 and 101131231004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101131231921) 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, 201456385 + ... + 201456886.

It is an arithmetic number, because the mean of its divisors is an integer number (25383536136).

Almost surely, 2^101131231021 is an apocalyptic number.

It is an amenable number.

101131231021 is a deficient number, since it is larger than the sum of its proper divisors (402913523).

101131231021 is an equidigital number, since it uses as much as digits as its factorization.

101131231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402913522.

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

Adding to 101131231021 its reverse (120132131101), we get a palindrome (221263362122).

The spelling of 101131231021 in words is "one hundred one billion, one hundred thirty-one million, two hundred thirty-one thousand, twenty-one".