131021430221 has 16 divisors (see below), whose sum is σ = 146103870528. Its totient is φ = 116482204800.

The previous prime is 131021430217. The next prime is 131021430223. The reversal of 131021430221 is 122034120131.

It is a cyclic number.

It is not a de Polignac number, because 131021430221 - 2² = 131021430217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131021430193 and 131021430202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131021430223) 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, 187040 + ... + 545001.

It is an arithmetic number, because the mean of its divisors is an integer number (9131491908).

Almost surely, 2^131021430221 is an apocalyptic number.

131021430221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131021430221 is a deficient number, since it is larger than the sum of its proper divisors (15082440307).

131021430221 is a wasteful number, since it uses less digits than its factorization.

131021430221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732412.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 131021430221 its reverse (122034120131), we get a palindrome (253055550352).

The spelling of 131021430221 in words is "one hundred thirty-one billion, twenty-one million, four hundred thirty thousand, two hundred twenty-one".