3131323011221 has 8 divisors (see below), whose sum is σ = 3208154040000. Its totient is φ = 3054513758560.

The previous prime is 3131323011169. The next prime is 3131323011253. The reversal of 3131323011221 is 1221103231313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131323011221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131323011121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5152721 + ... + 5728278.

It is an arithmetic number, because the mean of its divisors is an integer number (401019255000).

Almost surely, 2^{3131323011221} is an apocalyptic number.

It is an amenable number.

3131323011221 is a deficient number, since it is larger than the sum of its proper divisors (76831028779).

3131323011221 is a wasteful number, since it uses less digits than its factorization.

3131323011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10888059.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 3131323011221 its reverse (1221103231313), we get a palindrome (4352426242534).

The spelling of 3131323011221 in words is "three trillion, one hundred thirty-one billion, three hundred twenty-three million, eleven thousand, two hundred twenty-one".