1121020993 has 2 divisors, whose sum is σ = 1121020994. Its totient is φ = 1121020992.

The previous prime is 1121020963. The next prime is 1121021093. The reversal of 1121020993 is 3990201211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 853633089 + 267387904 = 29217^2 + 16352^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121020993 - 2¹⁷ = 1120889921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121020963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560510496 + 560510497.

It is an arithmetic number, because the mean of its divisors is an integer number (560510497).

Almost surely, 2^1121020993 is an apocalyptic number.

It is an amenable number.

1121020993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121020993 is an equidigital number, since it uses as much as digits as its factorization.

1121020993 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 28.

The square root of 1121020993 is about 33481.6515871007. The cubic root of 1121020993 is about 1038.8142900128.

The spelling of 1121020993 in words is "one billion, one hundred twenty-one million, twenty thousand, nine hundred ninety-three".