211112201121 has 4 divisors (see below), whose sum is σ = 281482934832. Its totient is φ = 140741467412.

The previous prime is 211112201077. The next prime is 211112201129. The reversal of 211112201121 is 121102211112.

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 211112201121 - 2⁹ = 211112200609 is a prime.

It is a super-2 number, since 2×211112201121² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211112201121.

It is not an unprimeable number, because it can be changed into a prime (211112201129) 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, 35185366851 + ... + 35185366856.

It is an arithmetic number, because the mean of its divisors is an integer number (70370733708).

Almost surely, 2^211112201121 is an apocalyptic number.

It is an amenable number.

211112201121 is a deficient number, since it is larger than the sum of its proper divisors (70370733711).

211112201121 is an equidigital number, since it uses as much as digits as its factorization.

211112201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70370733710.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211112201121 its reverse (121102211112), we get a palindrome (332214412233).

Subtracting from 211112201121 its reverse (121102211112), we obtain a palindrome (90009990009).

The spelling of 211112201121 in words is "two hundred eleven billion, one hundred twelve million, two hundred one thousand, one hundred twenty-one".