1121220421025 has 12 divisors (see below), whose sum is σ = 1390339595904. Its totient is φ = 896959386000.

The previous prime is 1121220421001. The next prime is 1121220421039. The reversal of 1121220421025 is 5201240221211.

It is not a de Polignac number, because 1121220421025 - 2¹⁴ = 1121220404641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1022360 + ... + 1813190.

It is an arithmetic number, because the mean of its divisors is an integer number (115861632992).

Almost surely, 2^{1121220421025} is an apocalyptic number.

It is an amenable number.

1121220421025 is a deficient number, since it is larger than the sum of its proper divisors (269119174879).

1121220421025 is an equidigital number, since it uses as much as digits as its factorization.

1121220421025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 847552 (or 847547 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 1121220421025 its reverse (5201240221211), we get a palindrome (6322460642236).

The spelling of 1121220421025 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, four hundred twenty-one thousand, twenty-five".