1121021117 has 2 divisors, whose sum is σ = 1121021118. Its totient is φ = 1121021116.

The previous prime is 1121021093. The next prime is 1121021149. The reversal of 1121021117 is 7111201211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 997233241 + 123787876 = 31579^2 + 11126^2 .

It is an emirp because it is prime and its reverse (7111201211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121021117 - 2¹⁰ = 1121020093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121021095 and 1121021104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121021197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560510558 + 560510559.

It is an arithmetic number, because the mean of its divisors is an integer number (560510559).

Almost surely, 2^1121021117 is an apocalyptic number.

It is an amenable number.

1121021117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121021117 is an equidigital number, since it uses as much as digits as its factorization.

1121021117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 17.

The square root of 1121021117 is about 33481.6534388611. The cubic root of 1121021117 is about 1038.8143283151.

Adding to 1121021117 its reverse (7111201211), we get a palindrome (8232222328).

The spelling of 1121021117 in words is "one billion, one hundred twenty-one million, twenty-one thousand, one hundred seventeen".