1223013031021 has 4 divisors (see below), whose sum is σ = 1227365390844. Its totient is φ = 1218660671200.

The previous prime is 1223013030977. The next prime is 1223013031057. The reversal of 1223013031021 is 1201303103221.

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 797466860100 + 425546170921 = 893010^2 + 652339^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223013031021 - 2¹⁵ = 1223012998253 is a prime.

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 1223013031021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223013034021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2176179490 + ... + 2176180051.

It is an arithmetic number, because the mean of its divisors is an integer number (306841347711).

Almost surely, 2^{1223013031021} is an apocalyptic number.

It is an amenable number.

1223013031021 is a deficient number, since it is larger than the sum of its proper divisors (4352359823).

1223013031021 is an equidigital number, since it uses as much as digits as its factorization.

1223013031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4352359822.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1223013031021 its reverse (1201303103221), we get a palindrome (2424316134242).

The spelling of 1223013031021 in words is "one trillion, two hundred twenty-three billion, thirteen million, thirty-one thousand, twenty-one".