131221046 has 8 divisors (see below), whose sum is σ = 214725384. Its totient is φ = 59645920.

The previous prime is 131221037. The next prime is 131221061. The reversal of 131221046 is 640122131.

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

It is a Curzon number.

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, 2982275 + ... + 2982318.

It is an arithmetic number, because the mean of its divisors is an integer number (26840673).

Almost surely, 2^131221046 is an apocalyptic number.

131221046 is a deficient number, since it is larger than the sum of its proper divisors (83504338).

131221046 is a wasteful number, since it uses less digits than its factorization.

131221046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5964606.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 131221046 is about 11455.1755115319. The cubic root of 131221046 is about 508.1608058304.

Adding to 131221046 its reverse (640122131), we get a palindrome (771343177).

The spelling of 131221046 in words is "one hundred thirty-one million, two hundred twenty-one thousand, forty-six".