131221302041021 has 8 divisors (see below), whose sum is σ = 131563277921280. Its totient is φ = 130879609609392.

The previous prime is 131221302040853. The next prime is 131221302041023. The reversal of 131221302041021 is 120140203122131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131221302041021 - 2¹⁸ = 131221301778877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131221302041023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69935045 + ... + 71786858.

It is an arithmetic number, because the mean of its divisors is an integer number (16445409740160).

Almost surely, 2^{131221302041021} is an apocalyptic number.

It is an amenable number.

131221302041021 is a deficient number, since it is larger than the sum of its proper divisors (341975880259).

131221302041021 is a wasteful number, since it uses less digits than its factorization.

131221302041021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141724315.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 131221302041021 its reverse (120140203122131), we get a palindrome (251361505163152).

The spelling of 131221302041021 in words is "one hundred thirty-one trillion, two hundred twenty-one billion, three hundred two million, forty-one thousand, twenty-one".