1121200291 has 8 divisors (see below), whose sum is σ = 1160564400. Its totient is φ = 1081883040.

The previous prime is 1121200277. The next prime is 1121200321. The reversal of 1121200291 is 1920021211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121200291 - 2⁷ = 1121200163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121200231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41076 + ... + 62686.

It is an arithmetic number, because the mean of its divisors is an integer number (145070550).

Almost surely, 2^1121200291 is an apocalyptic number.

1121200291 is a deficient number, since it is larger than the sum of its proper divisors (39364109).

1121200291 is a wasteful number, since it uses less digits than its factorization.

1121200291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23429.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 1121200291 is about 33484.3290361327. The cubic root of 1121200291 is about 1038.8696703005.

The spelling of 1121200291 in words is "one billion, one hundred twenty-one million, two hundred thousand, two hundred ninety-one".