331121221113101 has 4 divisors (see below), whose sum is σ = 331122735118812. Its totient is φ = 331119707107392.

The previous prime is 331121221113077. The next prime is 331121221113121. The reversal of 331121221113101 is 101311122121133.

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 61201754154025 + 269919466959076 = 7823155^2 + 16429226^2 .

It is a cyclic number.

It is not a de Polignac number, because 331121221113101 - 2²⁶ = 331121154004237 is a prime.

It is a super-2 number, since 2×331121221113101² (a number of 30 digits) contains 22 as substring.

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 (331121221113121) 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, 756674750 + ... + 757112223.

It is an arithmetic number, because the mean of its divisors is an integer number (82780683779703).

Almost surely, 2^{331121221113101} is an apocalyptic number.

It is an amenable number.

331121221113101 is a deficient number, since it is larger than the sum of its proper divisors (1514005711).

331121221113101 is a wasteful number, since it uses less digits than its factorization.

331121221113101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514005710.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 331121221113101 its reverse (101311122121133), we get a palindrome (432432343234234).

The spelling of 331121221113101 in words is "three hundred thirty-one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred thirteen thousand, one hundred one".