136231424221 has 8 divisors (see below), whose sum is σ = 144027711200. Its totient is φ = 128497758480.

The previous prime is 136231424207. The next prime is 136231424239. The reversal of 136231424221 is 122424132631.

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

It is a de Polignac number, because none of the positive numbers 2^k-136231424221 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 (136231424521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15650835 + ... + 15659536.

It is an arithmetic number, because the mean of its divisors is an integer number (18003463900).

Almost surely, 2^136231424221 is an apocalyptic number.

It is an amenable number.

136231424221 is a deficient number, since it is larger than the sum of its proper divisors (7796286979).

136231424221 is a wasteful number, since it uses less digits than its factorization.

136231424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31310619.

The product of its digits is 13824, while the sum is 31.

Adding to 136231424221 its reverse (122424132631), we get a palindrome (258655556852).

The spelling of 136231424221 in words is "one hundred thirty-six billion, two hundred thirty-one million, four hundred twenty-four thousand, two hundred twenty-one".