131221342 has 8 divisors (see below), whose sum is σ = 224950896. Its totient is φ = 56237712.

The previous prime is 131221339. The next prime is 131221379. The reversal of 131221342 is 243122131.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4686463 + ... + 4686490.

It is an arithmetic number, because the mean of its divisors is an integer number (28118862).

Almost surely, 2^131221342 is an apocalyptic number.

131221342 is a deficient number, since it is larger than the sum of its proper divisors (93729554).

131221342 is an equidigital number, since it uses as much as digits as its factorization.

131221342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9372962.

The product of its digits is 288, while the sum is 19.

The square root of 131221342 is about 11455.1884314489. The cubic root of 131221342 is about 508.1611879223.

Adding to 131221342 its reverse (243122131), we get a palindrome (374343473).

The spelling of 131221342 in words is "one hundred thirty-one million, two hundred twenty-one thousand, three hundred forty-two".