1121201211223 has 4 divisors (see below), whose sum is σ = 1125892429920. Its totient is φ = 1116509992528.

The previous prime is 1121201211161. The next prime is 1121201211241. The reversal of 1121201211223 is 3221121021211.

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 1121201211223 - 2¹⁷ = 1121201080151 is a prime.

It is a super-2 number, since 2×1121201211223² (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 1121201211223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121201211253) 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, 2345608990 + ... + 2345609467.

It is an arithmetic number, because the mean of its divisors is an integer number (281473107480).

Almost surely, 2^{1121201211223} is an apocalyptic number.

1121201211223 is a deficient number, since it is larger than the sum of its proper divisors (4691218697).

1121201211223 is an equidigital number, since it uses as much as digits as its factorization.

1121201211223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4691218696.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1121201211223 its reverse (3221121021211), we get a palindrome (4342322232434).

The spelling of 1121201211223 in words is "one trillion, one hundred twenty-one billion, two hundred one million, two hundred eleven thousand, two hundred twenty-three".