131422412021 has 4 divisors (see below), whose sum is σ = 131933783532. Its totient is φ = 130911040512.

The previous prime is 131422411993. The next prime is 131422412059. The reversal of 131422412021 is 120214224131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66288226225 + 65134185796 = 257465^2 + 255214^2 .

It is a cyclic number.

It is not a de Polignac number, because 131422412021 - 2¹⁰ = 131422410997 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 (131422412221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255685370 + ... + 255685883.

It is an arithmetic number, because the mean of its divisors is an integer number (32983445883).

Almost surely, 2^131422412021 is an apocalyptic number.

It is an amenable number.

131422412021 is a deficient number, since it is larger than the sum of its proper divisors (511371511).

131422412021 is an equidigital number, since it uses as much as digits as its factorization.

131422412021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511371510.

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

Adding to 131422412021 its reverse (120214224131), we get a palindrome (251636636152).

The spelling of 131422412021 in words is "one hundred thirty-one billion, four hundred twenty-two million, four hundred twelve thousand, twenty-one".