1121054501221 has 2 divisors, whose sum is σ = 1121054501222. Its totient is φ = 1121054501220.

The previous prime is 1121054501209. The next prime is 1121054501263. The reversal of 1121054501221 is 1221054501211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998228784996 + 122825716225 = 999114^2 + 350465^2 .

It is an emirp because it is prime and its reverse (1221054501211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121054501221 - 2²⁷ = 1120920283493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121054501921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560527250610 + 560527250611.

It is an arithmetic number, because the mean of its divisors is an integer number (560527250611).

Almost surely, 2^{1121054501221} is an apocalyptic number.

It is an amenable number.

1121054501221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121054501221 is an equidigital number, since it uses as much as digits as its factorization.

1121054501221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

The spelling of 1121054501221 in words is "one trillion, one hundred twenty-one billion, fifty-four million, five hundred one thousand, two hundred twenty-one".