331121100001 has 4 divisors (see below), whose sum is σ = 331155843732. Its totient is φ = 331086356272.

The previous prime is 331121099963. The next prime is 331121100047. The reversal of 331121100001 is 100001121133.

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

It can be written as a sum of positive squares in 2 ways, for example, as 91216080400 + 239905019601 = 302020^2 + 489801^2 .

It is a cyclic number.

It is not a de Polignac number, because 331121100001 - 2¹³ = 331121091809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331121130001) 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, 17357566 + ... + 17376631.

It is an arithmetic number, because the mean of its divisors is an integer number (82788960933).

Almost surely, 2^331121100001 is an apocalyptic number.

It is an amenable number.

331121100001 is a deficient number, since it is larger than the sum of its proper divisors (34743731).

331121100001 is an equidigital number, since it uses as much as digits as its factorization.

331121100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34743730.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 331121100001 its reverse (100001121133), we get a palindrome (431122221134).

The spelling of 331121100001 in words is "three hundred thirty-one billion, one hundred twenty-one million, one hundred thousand, one".