2111012020111 has 4 divisors (see below), whose sum is σ = 2111026015224. Its totient is φ = 2110998025000.

The previous prime is 2111012020081. The next prime is 2111012020141. The reversal of 2111012020111 is 1110202101112.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2111012020081) and next prime (2111012020141).

It is a cyclic number.

It is not a de Polignac number, because 2111012020111 - 2⁷ = 2111012019983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111012020091 and 2111012020100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111012020141) 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, 6768805 + ... + 7073806.

It is an arithmetic number, because the mean of its divisors is an integer number (527756503806).

Almost surely, 2^{2111012020111} is an apocalyptic number.

2111012020111 is a deficient number, since it is larger than the sum of its proper divisors (13995113).

2111012020111 is a wasteful number, since it uses less digits than its factorization.

2111012020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13995112.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2111012020111 its reverse (1110202101112), we get a palindrome (3221214121223).

The spelling of 2111012020111 in words is "two trillion, one hundred eleven billion, twelve million, twenty thousand, one hundred eleven".