3131122021333 has 4 divisors (see below), whose sum is σ = 3141808444908. Its totient is φ = 3120435597760.

The previous prime is 3131122021309. The next prime is 3131122021337. The reversal of 3131122021333 is 3331202211313.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1368661330404 + 1762460690929 = 1169898^2 + 1327577^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131122021333 - 2²⁹ = 3130585150421 is a prime.

It is a super-2 number, since 2×3131122021333² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131122021298 and 3131122021307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131122021337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5343211348 + ... + 5343211933.

It is an arithmetic number, because the mean of its divisors is an integer number (785452111227).

Almost surely, 2^{3131122021333} is an apocalyptic number.

It is an amenable number.

3131122021333 is a deficient number, since it is larger than the sum of its proper divisors (10686423575).

3131122021333 is a wasteful number, since it uses less digits than its factorization.

3131122021333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10686423574.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 3131122021333 its reverse (3331202211313), we get a palindrome (6462324232646).

The spelling of 3131122021333 in words is "three trillion, one hundred thirty-one billion, one hundred twenty-two million, twenty-one thousand, three hundred thirty-three".