331132021121231 has 4 divisors (see below), whose sum is σ = 361234932132264. Its totient is φ = 301029110110200.

The previous prime is 331132021121227. The next prime is 331132021121261. The reversal of 331132021121231 is 132121120231133.

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

It is a cyclic number.

It is not a de Polignac number, because 331132021121231 - 2² = 331132021121227 is a prime.

It is a super-2 number, since 2×331132021121231² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 331132021121231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331132021121261) 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, 15051455505500 + ... + 15051455505521.

It is an arithmetic number, because the mean of its divisors is an integer number (90308733033066).

Almost surely, 2^{331132021121231} is an apocalyptic number.

331132021121231 is a deficient number, since it is larger than the sum of its proper divisors (30102911011033).

331132021121231 is a wasteful number, since it uses less digits than its factorization.

331132021121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30102911011032.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 331132021121231 its reverse (132121120231133), we get a palindrome (463253141352364).

The spelling of 331132021121231 in words is "three hundred thirty-one trillion, one hundred thirty-two billion, twenty-one million, one hundred twenty-one thousand, two hundred thirty-one".