211021121100211 has 4 divisors (see below), whose sum is σ = 212021221200424. Its totient is φ = 210021021000000.

The previous prime is 211021121100187. The next prime is 211021121100247. The reversal of 211021121100211 is 112001121120112.

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 211021121100211 - 2³³ = 211012531165619 is a prime.

It is a super-2 number, since 2×211021121100211² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211021121100311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500050049790 + ... + 500050050211.

It is an arithmetic number, because the mean of its divisors is an integer number (53005305300106).

Almost surely, 2^{211021121100211} is an apocalyptic number.

211021121100211 is a deficient number, since it is larger than the sum of its proper divisors (1000100100213).

211021121100211 is a wasteful number, since it uses less digits than its factorization.

211021121100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000100100212.

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

Adding to 211021121100211 its reverse (112001121120112), we get a palindrome (323022242220323).

The spelling of 211021121100211 in words is "two hundred eleven trillion, twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred eleven".