2111212113 has 48 divisors (see below), whose sum is σ = 3128564736. Its totient is φ = 1263731040.

The previous prime is 2111212097. The next prime is 2111212157. The reversal of 2111212113 is 3112121112.

It is not a de Polignac number, because 2111212113 - 2⁴ = 2111212097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111212092 and 2111212101.

It is not an unprimeable number, because it can be changed into a prime (2111212183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3262756 + ... + 3263402.

It is an arithmetic number, because the mean of its divisors is an integer number (65178432).

Almost surely, 2^2111212113 is an apocalyptic number.

2111212113 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2111212113 is a deficient number, since it is larger than the sum of its proper divisors (1017352623).

2111212113 is a wasteful number, since it uses less digits than its factorization.

2111212113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842 (or 823 counting only the distinct ones).

The product of its digits is 24, while the sum is 15.

The square root of 2111212113 is about 45947.9282775622. The cubic root of 2111212113 is about 1282.8541683038.

Adding to 2111212113 its reverse (3112121112), we get a palindrome (5223333225).

The spelling of 2111212113 in words is "two billion, one hundred eleven million, two hundred twelve thousand, one hundred thirteen".