391110121201 has 4 divisors (see below), whose sum is σ = 392597232192. Its totient is φ = 389623010212.

The previous prime is 391110121169. The next prime is 391110121231. The reversal of 391110121201 is 102121011193.

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 391110121201 - 2⁵ = 391110121169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (391110121231) 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, 743555101 + ... + 743555626.

It is an arithmetic number, because the mean of its divisors is an integer number (98149308048).

Almost surely, 2^391110121201 is an apocalyptic number.

It is an amenable number.

391110121201 is a deficient number, since it is larger than the sum of its proper divisors (1487110991).

391110121201 is a wasteful number, since it uses less digits than its factorization.

391110121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487110990.

The product of its (nonzero) digits is 108, while the sum is 22.

Adding to 391110121201 its reverse (102121011193), we get a palindrome (493231132394).

The spelling of 391110121201 in words is "three hundred ninety-one billion, one hundred ten million, one hundred twenty-one thousand, two hundred one".