136221142 has 4 divisors (see below), whose sum is σ = 204331716. Its totient is φ = 68110570.

The previous prime is 136221133. The next prime is 136221167. The reversal of 136221142 is 241122631.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34055284 + ... + 34055287.

It is an arithmetic number, because the mean of its divisors is an integer number (51082929).

Almost surely, 2^136221142 is an apocalyptic number.

136221142 is a deficient number, since it is larger than the sum of its proper divisors (68110574).

136221142 is an equidigital number, since it uses as much as digits as its factorization.

136221142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68110573.

The product of its digits is 576, while the sum is 22.

The square root of 136221142 is about 11671.3813235623. The cubic root of 136221142 is about 514.5349016768.

Adding to 136221142 its reverse (241122631), we get a palindrome (377343773).

The spelling of 136221142 in words is "one hundred thirty-six million, two hundred twenty-one thousand, one hundred forty-two".