131421022541 has 4 divisors (see below), whose sum is σ = 131615145852. Its totient is φ = 131226899232.

The previous prime is 131421022517. The next prime is 131421022547. The reversal of 131421022541 is 145220124131.

It is a happy number.

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 75891985225 + 55529037316 = 275485^2 + 235646^2 .

It is a cyclic number.

It is not a de Polignac number, because 131421022541 - 2³⁴ = 114241153357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131421022541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131421022547) 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, 97060640 + ... + 97061993.

It is an arithmetic number, because the mean of its divisors is an integer number (32903786463).

Almost surely, 2^131421022541 is an apocalyptic number.

It is an amenable number.

131421022541 is a deficient number, since it is larger than the sum of its proper divisors (194123311).

131421022541 is an equidigital number, since it uses as much as digits as its factorization.

131421022541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194123310.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 131421022541 its reverse (145220124131), we get a palindrome (276641146672).

The spelling of 131421022541 in words is "one hundred thirty-one billion, four hundred twenty-one million, twenty-two thousand, five hundred forty-one".