2001102011231 has 4 divisors (see below), whose sum is σ = 2013847884072. Its totient is φ = 1988356138392.

The previous prime is 2001102011173. The next prime is 2001102011261. The reversal of 2001102011231 is 1321102011002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001102011231 is a prime.

It is a super-2 number, since 2×2001102011231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001102011261) 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, 6372936185 + ... + 6372936498.

It is an arithmetic number, because the mean of its divisors is an integer number (503461971018).

Almost surely, 2^{2001102011231} is an apocalyptic number.

2001102011231 is a deficient number, since it is larger than the sum of its proper divisors (12745872841).

2001102011231 is a wasteful number, since it uses less digits than its factorization.

2001102011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12745872840.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 2001102011231 its reverse (1321102011002), we get a palindrome (3322204022233).

The spelling of 2001102011231 in words is "two trillion, one billion, one hundred two million, eleven thousand, two hundred thirty-one".