1161222499 has 2 divisors, whose sum is σ = 1161222500. Its totient is φ = 1161222498.

The previous prime is 1161222497. The next prime is 1161222523. The reversal of 1161222499 is 9942221611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161222499 - 2¹ = 1161222497 is a prime.

Together with 1161222497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1161222497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580611249 + 580611250.

It is an arithmetic number, because the mean of its divisors is an integer number (580611250).

Almost surely, 2^1161222499 is an apocalyptic number.

1161222499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161222499 is an equidigital number, since it uses as much as digits as its factorization.

1161222499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 1161222499 is about 34076.7149091575. The cubic root of 1161222499 is about 1051.0865544446.

The spelling of 1161222499 in words is "one billion, one hundred sixty-one million, two hundred twenty-two thousand, four hundred ninety-nine".