1011220211233 has 4 divisors (see below), whose sum is σ = 1011247563028. Its totient is φ = 1011192859440.

The previous prime is 1011220211219. The next prime is 1011220211269. The reversal of 1011220211233 is 3321120221101.

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 275112838144 + 736107373089 = 524512^2 + 857967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011220211233 - 2¹⁷ = 1011220080161 is a prime.

It is a super-2 number, since 2×1011220211233² (a number of 25 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 1011220211233.

It is not an unprimeable number, because it can be changed into a prime (1011220211273) 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, 13620366 + ... + 13694407.

It is an arithmetic number, because the mean of its divisors is an integer number (252811890757).

Almost surely, 2^{1011220211233} is an apocalyptic number.

It is an amenable number.

1011220211233 is a deficient number, since it is larger than the sum of its proper divisors (27351795).

1011220211233 is an equidigital number, since it uses as much as digits as its factorization.

1011220211233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27351794.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1011220211233 its reverse (3321120221101), we get a palindrome (4332340432334).

The spelling of 1011220211233 in words is "one trillion, eleven billion, two hundred twenty million, two hundred eleven thousand, two hundred thirty-three".