2101201001111 has 4 divisors (see below), whose sum is σ = 2135646919224. Its totient is φ = 2066755083000.

The previous prime is 2101201001101. The next prime is 2101201001117. The reversal of 2101201001111 is 1111001021012.

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-2101201001111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101201001092 and 2101201001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101201001117) 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, 17222958965 + ... + 17222959086.

It is an arithmetic number, because the mean of its divisors is an integer number (533911729806).

Almost surely, 2^{2101201001111} is an apocalyptic number.

2101201001111 is a deficient number, since it is larger than the sum of its proper divisors (34445918113).

2101201001111 is an equidigital number, since it uses as much as digits as its factorization.

2101201001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34445918112.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 2101201001111 its reverse (1111001021012), we get a palindrome (3212202022123).

The spelling of 2101201001111 in words is "two trillion, one hundred one billion, two hundred one million, one thousand, one hundred eleven".