1121021611 has 2 divisors, whose sum is σ = 1121021612. Its totient is φ = 1121021610.

The previous prime is 1121021591. The next prime is 1121021621. The reversal of 1121021611 is 1161201211.

It is a strong prime.

It is an emirp because it is prime and its reverse (1161201211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121021611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121021621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560510805 + 560510806.

It is an arithmetic number, because the mean of its divisors is an integer number (560510806).

Almost surely, 2^1121021611 is an apocalyptic number.

1121021611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121021611 is an equidigital number, since it uses as much as digits as its factorization.

1121021611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 16.

The square root of 1121021611 is about 33481.6608160348. The cubic root of 1121021611 is about 1038.8144809064.

Adding to 1121021611 its reverse (1161201211), we get a palindrome (2282222822).

The spelling of 1121021611 in words is "one billion, one hundred twenty-one million, twenty-one thousand, six hundred eleven".