211200111210021 has 8 divisors (see below), whose sum is σ = 281600420418720. Its totient is φ = 140799938070672.

The previous prime is 211200111210001. The next prime is 211200111210031. The reversal of 211200111210021 is 120012111002112.

It is a happy number.

211200111210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 211200111210021 - 2¹³ = 211200111201829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200111210001) 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, 30338826 + ... + 36644843.

It is an arithmetic number, because the mean of its divisors is an integer number (35200052552340).

Almost surely, 2^{211200111210021} is an apocalyptic number.

It is an amenable number.

211200111210021 is a deficient number, since it is larger than the sum of its proper divisors (70400309208699).

211200111210021 is a wasteful number, since it uses less digits than its factorization.

211200111210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68034675.

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

Adding to 211200111210021 its reverse (120012111002112), we get a palindrome (331212222212133).

The spelling of 211200111210021 in words is "two hundred eleven trillion, two hundred billion, one hundred eleven million, two hundred ten thousand, twenty-one".