211222221212111 has 8 divisors (see below), whose sum is σ = 212489629793280. Its totient is φ = 209954843641528.

The previous prime is 211222221212099. The next prime is 211222221212129. The reversal of 211222221212111 is 111212122222112.

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

It is not a de Polignac number, because 211222221212111 - 2³⁴ = 211205041342927 is a prime.

It is a super-2 number, since 2×211222221212111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222221218111) 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, 5983610 + ... + 21406728.

It is an arithmetic number, because the mean of its divisors is an integer number (26561203724160).

Almost surely, 2^{211222221212111} is an apocalyptic number.

211222221212111 is a deficient number, since it is larger than the sum of its proper divisors (1267408581169).

211222221212111 is a wasteful number, since it uses less digits than its factorization.

211222221212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15505293.

The product of its digits is 256, while the sum is 23.

Adding to 211222221212111 its reverse (111212122222112), we get a palindrome (322434343434223).

The spelling of 211222221212111 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred eleven".