211222010011220 has 48 divisors (see below), whose sum is σ = 479104167713808. Its totient is φ = 77758241863680.

The previous prime is 211222010011183. The next prime is 211222010011231. The reversal of 211222010011220 is 22110010222112.

It can be written as a sum of positive squares in 8 ways, for example, as 35923456729924 + 175298553281296 = 5993618^2 + 13240036^2 .

It is a super-2 number, since 2×211222010011220² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1205242271 + ... + 1205417510.

It is an arithmetic number, because the mean of its divisors is an integer number (9981336827371).

Almost surely, 2^{211222010011220} is an apocalyptic number.

211222010011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222010011220 is an abundant number, since it is smaller than the sum of its proper divisors (267882157702588).

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

211222010011220 is a wasteful number, since it uses less digits than its factorization.

211222010011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410660140 (or 2410660138 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 211222010011220 its reverse (22110010222112), we get a palindrome (233332020233332).

The spelling of 211222010011220 in words is "two hundred eleven trillion, two hundred twenty-two billion, ten million, eleven thousand, two hundred twenty".