1000121211233 has 4 divisors (see below), whose sum is σ = 1001036236308. Its totient is φ = 999206186160.

The previous prime is 1000121211197. The next prime is 1000121211281. The reversal of 1000121211233 is 3321121210001.

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 584318061649 + 415803149584 = 764407^2 + 644828^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000121211233 is a prime.

It is a super-3 number, since 3×1000121211233³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000121211283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457510898 + ... + 457513083.

It is an arithmetic number, because the mean of its divisors is an integer number (250259059077).

Almost surely, 2^{1000121211233} is an apocalyptic number.

It is an amenable number.

1000121211233 is a deficient number, since it is larger than the sum of its proper divisors (915025075).

1000121211233 is an equidigital number, since it uses as much as digits as its factorization.

1000121211233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915025074.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1000121211233 its reverse (3321121210001), we get a palindrome (4321242421234).

The spelling of 1000121211233 in words is "one trillion, one hundred twenty-one million, two hundred eleven thousand, two hundred thirty-three".