1121210321243 has 4 divisors (see below), whose sum is σ = 1121597348760. Its totient is φ = 1120823293728.

The previous prime is 1121210321239. The next prime is 1121210321267. The reversal of 1121210321243 is 3421230121211.

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 1121210321243 - 2² = 1121210321239 is a prime.

It is a super-2 number, since 2×1121210321243² (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 (1121210321233) 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, 193509413 + ... + 193515206.

It is an arithmetic number, because the mean of its divisors is an integer number (280399337190).

Almost surely, 2^{1121210321243} is an apocalyptic number.

1121210321243 is a deficient number, since it is larger than the sum of its proper divisors (387027517).

1121210321243 is an equidigital number, since it uses as much as digits as its factorization.

1121210321243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387027516.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 1121210321243 its reverse (3421230121211), we get a palindrome (4542440442454).

The spelling of 1121210321243 in words is "one trillion, one hundred twenty-one billion, two hundred ten million, three hundred twenty-one thousand, two hundred forty-three".