211222102212220 has 48 divisors (see below), whose sum is σ = 485600495200128. Its totient is φ = 76536630653760.

The previous prime is 211222102212167. The next prime is 211222102212227. The reversal of 211222102212220 is 22212201222112.

It is a super-2 number, since 2×211222102212220² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 211222102212191 and 211222102212200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222102212227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696228314 + ... + 1696352833.

It is an arithmetic number, because the mean of its divisors is an integer number (10116676983336).

Almost surely, 2^{211222102212220} is an apocalyptic number.

211222102212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222102212220 is an abundant number, since it is smaller than the sum of its proper divisors (274378392987908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211222102212220 is a wasteful number, since it uses less digits than its factorization.

211222102212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392581450 (or 3392581448 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 211222102212220 its reverse (22212201222112), we get a palindrome (233434303434332).

The spelling of 211222102212220 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred two million, two hundred twelve thousand, two hundred twenty".