2031201111001 has 4 divisors (see below), whose sum is σ = 2034311679972. Its totient is φ = 2028090542032.

The previous prime is 2031201110993. The next prime is 2031201111007. The reversal of 2031201111001 is 1001111021302.

It is a happy number.

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 1136247270601 + 894953840400 = 1065949^2 + 946020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031201111001 - 2³ = 2031201110993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2031201111007) 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, 1555283506 + ... + 1555284811.

It is an arithmetic number, because the mean of its divisors is an integer number (508577919993).

Almost surely, 2^{2031201111001} is an apocalyptic number.

It is an amenable number.

2031201111001 is a deficient number, since it is larger than the sum of its proper divisors (3110568971).

2031201111001 is an equidigital number, since it uses as much as digits as its factorization.

2031201111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3110568970.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 2031201111001 its reverse (1001111021302), we get a palindrome (3032312132303).

The spelling of 2031201111001 in words is "two trillion, thirty-one billion, two hundred one million, one hundred eleven thousand, one".