211222233420 has 144 divisors (see below), whose sum is σ = 685373246208. Its totient is φ = 48193264640.

The previous prime is 211222233379. The next prime is 211222233421. The reversal of 211222233420 is 24332222112.

It is a super-3 number, since 3×211222233420³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (211222233421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362952 + ... + 744431.

It is an arithmetic number, because the mean of its divisors is an integer number (4759536432).

Almost surely, 2^211222233420 is an apocalyptic number.

211222233420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211222233420 is an abundant number, since it is smaller than the sum of its proper divisors (474151012788).

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

211222233420 is a wasteful number, since it uses less digits than its factorization.

211222233420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107440 (or 1107421 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 211222233420 its reverse (24332222112), we get a palindrome (235554455532).

The spelling of 211222233420 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred thirty-three thousand, four hundred twenty".