103131001021 has 4 divisors (see below), whose sum is σ = 103134023200. Its totient is φ = 103127978844.

The previous prime is 103131001003. The next prime is 103131001153. The reversal of 103131001021 is 120100131301.

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.

It is a cyclic number.

It is not a de Polignac number, because 103131001021 - 2⁵ = 103131000989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103131000992 and 103131001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103191001021) 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, 1459311 + ... + 1528348.

It is an arithmetic number, because the mean of its divisors is an integer number (25783505800).

Almost surely, 2^103131001021 is an apocalyptic number.

It is an amenable number.

103131001021 is a deficient number, since it is larger than the sum of its proper divisors (3022179).

103131001021 is an equidigital number, since it uses as much as digits as its factorization.

103131001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022178.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 103131001021 its reverse (120100131301), we get a palindrome (223231132322).

The spelling of 103131001021 in words is "one hundred three billion, one hundred thirty-one million, one thousand, twenty-one".