131421234313221 has 32 divisors (see below), whose sum is σ = 178496045988480. Its totient is φ = 85995449438976.

The previous prime is 131421234313207. The next prime is 131421234313241. The reversal of 131421234313221 is 122313432124131.

It is not a de Polignac number, because 131421234313221 - 2¹⁷ = 131421234182149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421234313241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1029907395 + ... + 1030034991.

It is an arithmetic number, because the mean of its divisors is an integer number (5578001437140).

Almost surely, 2^{131421234313221} is an apocalyptic number.

It is an amenable number.

131421234313221 is a deficient number, since it is larger than the sum of its proper divisors (47074811675259).

131421234313221 is a wasteful number, since it uses less digits than its factorization.

131421234313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157253.

The product of its digits is 20736, while the sum is 33.

Adding to 131421234313221 its reverse (122313432124131), we get a palindrome (253734666437352).

The spelling of 131421234313221 in words is "one hundred thirty-one trillion, four hundred twenty-one billion, two hundred thirty-four million, three hundred thirteen thousand, two hundred twenty-one".