2123101111 has 8 divisors (see below), whose sum is σ = 2137164480. Its totient is φ = 2109071328.

The previous prime is 2123101069. The next prime is 2123101139. The reversal of 2123101111 is 1111013212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2123101111 - 2¹³ = 2123092919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2123101091 and 2123101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123101171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125410 + ... + 141328.

It is an arithmetic number, because the mean of its divisors is an integer number (267145560).

Almost surely, 2^2123101111 is an apocalyptic number.

2123101111 is a deficient number, since it is larger than the sum of its proper divisors (14063369).

2123101111 is a wasteful number, since it uses less digits than its factorization.

2123101111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16793.

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

The square root of 2123101111 is about 46077.1213402053. The cubic root of 2123101111 is about 1285.2577338860.

Adding to 2123101111 its reverse (1111013212), we get a palindrome (3234114323).

It can be divided in two parts, 2123101 and 111, that added together give a palindrome (2123212).

The spelling of 2123101111 in words is "two billion, one hundred twenty-three million, one hundred one thousand, one hundred eleven".