1201200091 has 8 divisors (see below), whose sum is σ = 1478400224. Its totient is φ = 950400000.

The previous prime is 1201200073. The next prime is 1201200107. The reversal of 1201200091 is 1900021021.

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 1201200091 - 2⁷ = 1201199963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201200031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6599910 + ... + 6600091.

It is an arithmetic number, because the mean of its divisors is an integer number (184800028).

Almost surely, 2^1201200091 is an apocalyptic number.

1201200091 is a deficient number, since it is larger than the sum of its proper divisors (277200133).

1201200091 is a wasteful number, since it uses less digits than its factorization.

1201200091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200021.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 1201200091 is about 34658.3336443055. Note that the first 3 decimals coincide. The cubic root of 1201200091 is about 1063.0126975418.

The spelling of 1201200091 in words is "one billion, two hundred one million, two hundred thousand, ninety-one".