1161221707 has 4 divisors (see below), whose sum is σ = 1169575960. Its totient is φ = 1152867456.

The previous prime is 1161221647. The next prime is 1161221713. The reversal of 1161221707 is 7071221611.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1161221707 - 2¹¹ = 1161219659 is a prime.

It is a super-3 number, since 3×1161221707³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161221207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4176918 + ... + 4177195.

It is an arithmetic number, because the mean of its divisors is an integer number (292393990).

Almost surely, 2^1161221707 is an apocalyptic number.

1161221707 is a deficient number, since it is larger than the sum of its proper divisors (8354253).

1161221707 is an equidigital number, since it uses as much as digits as its factorization.

1161221707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8354252.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 1161221707 is about 34076.7032883171. The cubic root of 1161221707 is about 1051.0863154836.

The spelling of 1161221707 in words is "one billion, one hundred sixty-one million, two hundred twenty-one thousand, seven hundred seven".