1201123231331 has 4 divisors (see below), whose sum is σ = 1201134601632. Its totient is φ = 1201111861032.

The previous prime is 1201123231307. The next prime is 1201123231337. The reversal of 1201123231331 is 1331323211021.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201123231331 is a prime.

It is a super-2 number, since 2×1201123231331² (a number of 25 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 = 1201123231297 and 1201123231306.

It is not an unprimeable number, because it can be changed into a prime (1201123231337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5525195 + ... + 5738468.

It is an arithmetic number, because the mean of its divisors is an integer number (300283650408).

Almost surely, 2^{1201123231331} is an apocalyptic number.

1201123231331 is a deficient number, since it is larger than the sum of its proper divisors (11370301).

1201123231331 is a wasteful number, since it uses less digits than its factorization.

1201123231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370300.

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

Adding to 1201123231331 its reverse (1331323211021), we get a palindrome (2532446442352).

The spelling of 1201123231331 in words is "one trillion, two hundred one billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred thirty-one".