211111022113 has 4 divisors (see below), whose sum is σ = 222222128560. Its totient is φ = 199999915668.

The previous prime is 211111022077. The next prime is 211111022131. The reversal of 211111022113 is 311220111112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211111022113 - 2²⁵ = 211077467681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211111022183) 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, 5555553195 + ... + 5555553232.

It is an arithmetic number, because the mean of its divisors is an integer number (55555532140).

Almost surely, 2^211111022113 is an apocalyptic number.

It is an amenable number.

211111022113 is a deficient number, since it is larger than the sum of its proper divisors (11111106447).

211111022113 is a wasteful number, since it uses less digits than its factorization.

211111022113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111106446.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 211111022113 its reverse (311220111112), we get a palindrome (522331133225).

The spelling of 211111022113 in words is "two hundred eleven billion, one hundred eleven million, twenty-two thousand, one hundred thirteen".