131122535421 has 16 divisors (see below), whose sum is σ = 177761622528. Its totient is φ = 85950292800.

The previous prime is 131122535407. The next prime is 131122535429. The reversal of 131122535421 is 124535221131.

It is a happy number.

It is not a de Polignac number, because 131122535421 - 2¹⁴ = 131122519037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122535429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 370900 + ... + 632306.

It is an arithmetic number, because the mean of its divisors is an integer number (11110101408).

Almost surely, 2^131122535421 is an apocalyptic number.

It is an amenable number.

131122535421 is a deficient number, since it is larger than the sum of its proper divisors (46639087107).

131122535421 is a wasteful number, since it uses less digits than its factorization.

131122535421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264212.

The product of its digits is 7200, while the sum is 30.

Adding to 131122535421 its reverse (124535221131), we get a palindrome (255657756552).

The spelling of 131122535421 in words is "one hundred thirty-one billion, one hundred twenty-two million, five hundred thirty-five thousand, four hundred twenty-one".