212120221302 has 48 divisors (see below), whose sum is σ = 501468786000. Its totient is φ = 64266840000.

The previous prime is 212120221147. The next prime is 212120221303. The reversal of 212120221302 is 203122021212.

212120221302 is a `hidden beast` number, since 2 + 121 + 20 + 221 + 302 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120221303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 991824 + ... + 1186572.

It is an arithmetic number, because the mean of its divisors is an integer number (10447266375).

Almost surely, 2^212120221302 is an apocalyptic number.

212120221302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212120221302 is an abundant number, since it is smaller than the sum of its proper divisors (289348564698).

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

212120221302 is a wasteful number, since it uses less digits than its factorization.

212120221302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200269 (or 200266 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212120221302 its reverse (203122021212), we get a palindrome (415242242514).

The spelling of 212120221302 in words is "two hundred twelve billion, one hundred twenty million, two hundred twenty-one thousand, three hundred two".