131121020213 has 16 divisors (see below), whose sum is σ = 146680439040. Its totient is φ = 116481369600.

The previous prime is 131121020167. The next prime is 131121020237. The reversal of 131121020213 is 312020121131.

It is not a de Polignac number, because 131121020213 - 2²⁶ = 131053911349 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131121020191 and 131121020200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131121020263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 661448 + ... + 836513.

It is an arithmetic number, because the mean of its divisors is an integer number (9167527440).

Almost surely, 2^131121020213 is an apocalyptic number.

It is an amenable number.

131121020213 is a deficient number, since it is larger than the sum of its proper divisors (15559418827).

131121020213 is a wasteful number, since it uses less digits than its factorization.

131121020213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498268.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 131121020213 its reverse (312020121131), we get a palindrome (443141141344).

The spelling of 131121020213 in words is "one hundred thirty-one billion, one hundred twenty-one million, twenty thousand, two hundred thirteen".