1113212121233 has 4 divisors (see below), whose sum is σ = 1113406167780. Its totient is φ = 1113018074688.

The previous prime is 1113212121221. The next prime is 1113212121313. The reversal of 1113212121233 is 3321212123111.

It is a happy number.

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 49886115904 + 1063326005329 = 223352^2 + 1031177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1113212121233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1113212121199 and 1113212121208.

It is not an unprimeable number, because it can be changed into a prime (1113212121533) 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, 97014668 + ... + 97026141.

It is an arithmetic number, because the mean of its divisors is an integer number (278351541945).

Almost surely, 2^{1113212121233} is an apocalyptic number.

It is an amenable number.

1113212121233 is a deficient number, since it is larger than the sum of its proper divisors (194046547).

1113212121233 is an equidigital number, since it uses as much as digits as its factorization.

1113212121233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194046546.

The product of its digits is 432, while the sum is 23.

Adding to 1113212121233 its reverse (3321212123111), we get a palindrome (4434424244344).

The spelling of 1113212121233 in words is "one trillion, one hundred thirteen billion, two hundred twelve million, one hundred twenty-one thousand, two hundred thirty-three".