1201431099 has 16 divisors (see below), whose sum is σ = 1748718720. Its totient is φ = 727647360.

The previous prime is 1201431079. The next prime is 1201431103. The reversal of 1201431099 is 9901341021.

1201431099 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1201431099 - 2⁵ = 1201431067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201431079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40579 + ... + 63635.

It is an arithmetic number, because the mean of its divisors is an integer number (109294920).

Almost surely, 2^1201431099 is an apocalyptic number.

1201431099 is a deficient number, since it is larger than the sum of its proper divisors (547287621).

1201431099 is a wasteful number, since it uses less digits than its factorization.

1201431099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24650.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1201431099 is about 34661.6661313330. Note that the first 3 decimals coincide. The cubic root of 1201431099 is about 1063.0808373682.

The spelling of 1201431099 in words is "one billion, two hundred one million, four hundred thirty-one thousand, ninety-nine".