1211102993 has 2 divisors, whose sum is σ = 1211102994. Its totient is φ = 1211102992.

The previous prime is 1211102989. The next prime is 1211102999. The reversal of 1211102993 is 3992011121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208813824 + 2289169 = 34768^2 + 1513^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211102993 - 2² = 1211102989 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211102999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605551496 + 605551497.

It is an arithmetic number, because the mean of its divisors is an integer number (605551497).

Almost surely, 2^1211102993 is an apocalyptic number.

It is an amenable number.

1211102993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211102993 is an equidigital number, since it uses as much as digits as its factorization.

1211102993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1211102993 is about 34800.9050600699. The cubic root of 1211102993 is about 1065.9259268086.

The spelling of 1211102993 in words is "one billion, two hundred eleven million, one hundred two thousand, nine hundred ninety-three".