1221112331233 has 4 divisors (see below), whose sum is σ = 1221120742660. Its totient is φ = 1221103919808.

The previous prime is 1221112331203. The next prime is 1221112331251. The reversal of 1221112331233 is 3321332111221.

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 428668753984 + 792443577249 = 654728^2 + 890193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221112331233 is a prime.

It is a super-2 number, since 2×1221112331233² (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 = 1221112331198 and 1221112331207.

It is not an unprimeable number, because it can be changed into a prime (1221112331203) 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, 3984060 + ... + 4279597.

It is an arithmetic number, because the mean of its divisors is an integer number (305280185665).

Almost surely, 2^{1221112331233} is an apocalyptic number.

It is an amenable number.

1221112331233 is a deficient number, since it is larger than the sum of its proper divisors (8411427).

1221112331233 is an equidigital number, since it uses as much as digits as its factorization.

1221112331233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8411426.

The product of its digits is 1296, while the sum is 25.

Adding to 1221112331233 its reverse (3321332111221), we get a palindrome (4542444442454).

The spelling of 1221112331233 in words is "one trillion, two hundred twenty-one billion, one hundred twelve million, three hundred thirty-one thousand, two hundred thirty-three".