212223021332 has 72 divisors (see below), whose sum is σ = 461804898240. Its totient is φ = 84876274560.

The previous prime is 212223021317. The next prime is 212223021337. The reversal of 212223021332 is 233120322212.

It is a super-2 number, since 2×212223021332² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 212223021298 and 212223021307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212223021337) 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 23 ways as a sum of consecutive naturals, for example, 389282 + ... + 758937.

It is an arithmetic number, because the mean of its divisors is an integer number (6413956920).

Almost surely, 2^212223021332 is an apocalyptic number.

It is an amenable number.

212223021332 is an abundant number, since it is smaller than the sum of its proper divisors (249581876908).

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

212223021332 is a wasteful number, since it uses less digits than its factorization.

212223021332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148301 (or 1148292 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 212223021332 its reverse (233120322212), we get a palindrome (445343343544).

The spelling of 212223021332 in words is "two hundred twelve billion, two hundred twenty-three million, twenty-one thousand, three hundred thirty-two".