159990121100101 has 4 divisors (see below), whose sum is σ = 168410653789600. Its totient is φ = 151569588410604.

The previous prime is 159990121100053. The next prime is 159990121100129. The reversal of 159990121100101 is 101001121099951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 159990121100101 - 2⁷ = 159990121099973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159990121100171) 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, 4210266344721 + ... + 4210266344758.

It is an arithmetic number, because the mean of its divisors is an integer number (42102663447400).

Almost surely, 2^{159990121100101} is an apocalyptic number.

It is an amenable number.

159990121100101 is a deficient number, since it is larger than the sum of its proper divisors (8420532689499).

159990121100101 is an equidigital number, since it uses as much as digits as its factorization.

159990121100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8420532689498.

The product of its (nonzero) digits is 7290, while the sum is 40.

The spelling of 159990121100101 in words is "one hundred fifty-nine trillion, nine hundred ninety billion, one hundred twenty-one million, one hundred thousand, one hundred one".