1121240021243 has 8 divisors (see below), whose sum is σ = 1231567987200. Its totient is φ = 1016043588648.

The previous prime is 1121240021227. The next prime is 1121240021267. The reversal of 1121240021243 is 3421200421211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121240021243 - 2⁴ = 1121240021227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121240021843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1282882883 + ... + 1282883756.

It is an arithmetic number, because the mean of its divisors is an integer number (153945998400).

Almost surely, 2^{1121240021243} is an apocalyptic number.

1121240021243 is a deficient number, since it is larger than the sum of its proper divisors (110327965957).

1121240021243 is a wasteful number, since it uses less digits than its factorization.

1121240021243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565766681.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 1121240021243 its reverse (3421200421211), we get a palindrome (4542440442454).

The spelling of 1121240021243 in words is "one trillion, one hundred twenty-one billion, two hundred forty million, twenty-one thousand, two hundred forty-three".