131110001021 has 4 divisors (see below), whose sum is σ = 136810435872. Its totient is φ = 125409566172.

The previous prime is 131110000997. The next prime is 131110001039. The reversal of 131110001021 is 120100011131.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131110001021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131110000993 and 131110001011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131110003021) 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, 2850217391 + ... + 2850217436.

It is an arithmetic number, because the mean of its divisors is an integer number (34202608968).

Almost surely, 2^131110001021 is an apocalyptic number.

It is an amenable number.

131110001021 is a deficient number, since it is larger than the sum of its proper divisors (5700434851).

131110001021 is an equidigital number, since it uses as much as digits as its factorization.

131110001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700434850.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 131110001021 its reverse (120100011131), we get a palindrome (251210012152).

The spelling of 131110001021 in words is "one hundred thirty-one billion, one hundred ten million, one thousand, twenty-one".