1121220421023 has 16 divisors (see below), whose sum is σ = 1498964968800. Its totient is φ = 745478492160.

The previous prime is 1121220421001. The next prime is 1121220421039. The reversal of 1121220421023 is 3201240221211.

It is a happy number.

It is not a de Polignac number, because 1121220421023 - 2²² = 1121216226719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121220421093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11998063 + ... + 12091151.

It is an arithmetic number, because the mean of its divisors is an integer number (93685310550).

Almost surely, 2^{1121220421023} is an apocalyptic number.

1121220421023 is a deficient number, since it is larger than the sum of its proper divisors (377744547777).

1121220421023 is a wasteful number, since it uses less digits than its factorization.

1121220421023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103802.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 1121220421023 its reverse (3201240221211), we get a palindrome (4322460642234).

The spelling of 1121220421023 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, four hundred twenty-one thousand, twenty-three".