211200022102021 has 4 divisors (see below), whose sum is σ = 212719446721600. Its totient is φ = 209680597482444.

The previous prime is 211200022102019. The next prime is 211200022102033. The reversal of 211200022102021 is 120201220002112.

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 211200022102021 - 2¹ = 211200022102019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211200022101986 and 211200022102004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200022100021) 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 3 ways as a sum of consecutive naturals, for example, 759712309581 + ... + 759712309858.

It is an arithmetic number, because the mean of its divisors is an integer number (53179861680400).

Almost surely, 2^{211200022102021} is an apocalyptic number.

It is an amenable number.

211200022102021 is a deficient number, since it is larger than the sum of its proper divisors (1519424619579).

211200022102021 is a wasteful number, since it uses less digits than its factorization.

211200022102021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519424619578.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 211200022102021 its reverse (120201220002112), we get a palindrome (331401242104133).

The spelling of 211200022102021 in words is "two hundred eleven trillion, two hundred billion, twenty-two million, one hundred two thousand, twenty-one".