1121200081 has 2 divisors, whose sum is σ = 1121200082. Its totient is φ = 1121200080.

The previous prime is 1121200057. The next prime is 1121200141. The reversal of 1121200081 is 1800021211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 586850625 + 534349456 = 24225^2 + 23116^2 .

It is an emirp because it is prime and its reverse (1800021211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121200081 - 2¹⁹ = 1120675793 is a prime.

It is a super-2 number, since 2×1121200081² = 2514179243268813122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1121200681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560600040 + 560600041.

It is an arithmetic number, because the mean of its divisors is an integer number (560600041).

Almost surely, 2^1121200081 is an apocalyptic number.

It is an amenable number.

1121200081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121200081 is an equidigital number, since it uses as much as digits as its factorization.

1121200081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1121200081 is about 33484.3259003373. The cubic root of 1121200081 is about 1038.8696054406.

Adding to 1121200081 its reverse (1800021211), we get a palindrome (2921221292).

The spelling of 1121200081 in words is "one billion, one hundred twenty-one million, two hundred thousand, eighty-one".