1201100159 has 4 divisors (see below), whose sum is σ = 1372685904. Its totient is φ = 1029514416.

The previous prime is 1201100149. The next prime is 1201100189. The reversal of 1201100159 is 9510011021.

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

It is not a de Polignac number, because 1201100159 - 2²⁸ = 932664703 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201100159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1201100149) 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, 85792862 + ... + 85792875.

It is an arithmetic number, because the mean of its divisors is an integer number (343171476).

Almost surely, 2^1201100159 is an apocalyptic number.

1201100159 is a deficient number, since it is larger than the sum of its proper divisors (171585745).

1201100159 is an equidigital number, since it uses as much as digits as its factorization.

1201100159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171585744.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1201100159 is about 34656.8919408536. The cubic root of 1201100159 is about 1062.9832181537.

The spelling of 1201100159 in words is "one billion, two hundred one million, one hundred thousand, one hundred fifty-nine".