211121022112111 has 4 divisors (see below), whose sum is σ = 211123844773672. Its totient is φ = 211118199450552.

The previous prime is 211121022112081. The next prime is 211121022112151. The reversal of 211121022112111 is 111211220121112.

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

It is a cyclic number.

It is not a de Polignac number, because 211121022112111 - 2⁹ = 211121022111599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121022112151) 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, 1411218585 + ... + 1411368178.

It is an arithmetic number, because the mean of its divisors is an integer number (52780961193418).

Almost surely, 2^{211121022112111} is an apocalyptic number.

211121022112111 is a deficient number, since it is larger than the sum of its proper divisors (2822661561).

211121022112111 is an equidigital number, since it uses as much as digits as its factorization.

211121022112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822661560.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 211121022112111 its reverse (111211220121112), we get a palindrome (322332242233223).

The spelling of 211121022112111 in words is "two hundred eleven trillion, one hundred twenty-one billion, twenty-two million, one hundred twelve thousand, one hundred eleven".