131021222400221 has 8 divisors (see below), whose sum is σ = 132034325004864. Its totient is φ = 130010033116800.

The previous prime is 131021222400181. The next prime is 131021222400283. The reversal of 131021222400221 is 122004222120131.

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

It is not a de Polignac number, because 131021222400221 - 2²⁶ = 131021155291357 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 (131021222400821) 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, 478192820 + ... + 478466733.

It is an arithmetic number, because the mean of its divisors is an integer number (16504290625608).

Almost surely, 2^{131021222400221} is an apocalyptic number.

It is an amenable number.

131021222400221 is a deficient number, since it is larger than the sum of its proper divisors (1013102604643).

131021222400221 is an equidigital number, since it uses as much as digits as its factorization.

131021222400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956660611.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 131021222400221 its reverse (122004222120131), we get a palindrome (253025444520352).

The spelling of 131021222400221 in words is "one hundred thirty-one trillion, twenty-one billion, two hundred twenty-two million, four hundred thousand, two hundred twenty-one".