1001121111223 has 4 divisors (see below), whose sum is σ = 1001123157960. Its totient is φ = 1001119064488.

The previous prime is 1001121111167. The next prime is 1001121111253. The reversal of 1001121111223 is 3221111211001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001121111223 - 2²⁹ = 1000584240311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001121111197 and 1001121111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001121111253) 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, 189408 + ... + 1427626.

It is an arithmetic number, because the mean of its divisors is an integer number (250280789490).

Almost surely, 2^{1001121111223} is an apocalyptic number.

1001121111223 is a deficient number, since it is larger than the sum of its proper divisors (2046737).

1001121111223 is an equidigital number, since it uses as much as digits as its factorization.

1001121111223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2046736.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 1001121111223 its reverse (3221111211001), we get a palindrome (4222232322224).

The spelling of 1001121111223 in words is "one trillion, one billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-three".