1121475221 has 2 divisors, whose sum is σ = 1121475222. Its totient is φ = 1121475220.

The previous prime is 1121475191. The next prime is 1121475241. The reversal of 1121475221 is 1225741211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1120240900 + 1234321 = 33470^2 + 1111^2 .

It is an emirp because it is prime and its reverse (1225741211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121475221 - 2¹⁴ = 1121458837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121475241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560737610 + 560737611.

It is an arithmetic number, because the mean of its divisors is an integer number (560737611).

Almost surely, 2^1121475221 is an apocalyptic number.

It is an amenable number.

1121475221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121475221 is an equidigital number, since it uses as much as digits as its factorization.

1121475221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1120, while the sum is 26.

The square root of 1121475221 is about 33488.4341377736. The cubic root of 1121475221 is about 1038.9545772520.

The spelling of 1121475221 in words is "one billion, one hundred twenty-one million, four hundred seventy-five thousand, two hundred twenty-one".