211201212222 has 96 divisors (see below), whose sum is σ = 614403578880. Its totient is φ = 50637648960.

The previous prime is 211201212193. The next prime is 211201212253. The reversal of 211201212222 is 222212102112.

It is a happy number.

211201212222 is a `hidden beast` number, since 211 + 20 + 1 + 212 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 211201212195 and 211201212204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5842822 + ... + 5878857.

It is an arithmetic number, because the mean of its divisors is an integer number (6400037280).

Almost surely, 2^211201212222 is an apocalyptic number.

211201212222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211201212222 is an abundant number, since it is smaller than the sum of its proper divisors (403202366658).

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

211201212222 is a wasteful number, since it uses less digits than its factorization.

211201212222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11721718 (or 11721715 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211201212222 its reverse (222212102112), we get a palindrome (433413314334).

The spelling of 211201212222 in words is "two hundred eleven billion, two hundred one million, two hundred twelve thousand, two hundred twenty-two".