2101320111001 has 4 divisors (see below), whose sum is σ = 2224927176372. Its totient is φ = 1977713045632.

The previous prime is 2101320110987. The next prime is 2101320111019. The reversal of 2101320111001 is 1001110231012.

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 1299426725776 + 801893385225 = 1139924^2 + 895485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101320111001 - 2⁵ = 2101320110969 is a prime.

It is a super-2 number, since 2×2101320111001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101320111101) 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, 61803532660 + ... + 61803532693.

It is an arithmetic number, because the mean of its divisors is an integer number (556231794093).

Almost surely, 2^{2101320111001} is an apocalyptic number.

It is an amenable number.

2101320111001 is a deficient number, since it is larger than the sum of its proper divisors (123607065371).

2101320111001 is a wasteful number, since it uses less digits than its factorization.

2101320111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123607065370.

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

Adding to 2101320111001 its reverse (1001110231012), we get a palindrome (3102430342013).

The spelling of 2101320111001 in words is "two trillion, one hundred one billion, three hundred twenty million, one hundred eleven thousand, one".