1221031013233 has 4 divisors (see below), whose sum is σ = 1221127618788. Its totient is φ = 1220934407680.

The previous prime is 1221031013179. The next prime is 1221031013303. The reversal of 1221031013233 is 3323101301221.

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 46445422144 + 1174585591089 = 215512^2 + 1083783^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221031013233 - 2²⁹ = 1220494142321 is a prime.

It is a super-2 number, since 2×1221031013233² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221031013833) 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, 48283816 + ... + 48309097.

It is an arithmetic number, because the mean of its divisors is an integer number (305281904697).

Almost surely, 2^{1221031013233} is an apocalyptic number.

It is an amenable number.

1221031013233 is a deficient number, since it is larger than the sum of its proper divisors (96605555).

1221031013233 is an equidigital number, since it uses as much as digits as its factorization.

1221031013233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96605554.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1221031013233 its reverse (3323101301221), we get a palindrome (4544132314454).

The spelling of 1221031013233 in words is "one trillion, two hundred twenty-one billion, thirty-one million, thirteen thousand, two hundred thirty-three".