1121220112021 has 2 divisors, whose sum is σ = 1121220112022. Its totient is φ = 1121220112020.

The previous prime is 1121220111967. The next prime is 1121220112031. The reversal of 1121220112021 is 1202110221211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856067207121 + 265152904900 = 925239^2 + 514930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121220112021 - 2²⁷ = 1121085894293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121220111986 and 1121220112004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121220112031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560610056010 + 560610056011.

It is an arithmetic number, because the mean of its divisors is an integer number (560610056011).

Almost surely, 2^{1121220112021} is an apocalyptic number.

It is an amenable number.

1121220112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121220112021 is an equidigital number, since it uses as much as digits as its factorization.

1121220112021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1121220112021 its reverse (1202110221211), we get a palindrome (2323330333232).

The spelling of 1121220112021 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, twenty-one".