221212020022002 has 24 divisors (see below), whose sum is σ = 479293038426384. Its totient is φ = 73737289487544.

The previous prime is 221212020021953. The next prime is 221212020022013. The reversal of 221212020022002 is 200220020212122.

221212020022002 is a `hidden beast` number, since 221 + 2 + 1 + 20 + 200 + 220 + 0 + 2 = 666.

It is a super-2 number, since 2×221212020022002² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30547873 + ... + 37089035.

It is an arithmetic number, because the mean of its divisors is an integer number (19970543267766).

Almost surely, 2^{221212020022002} is an apocalyptic number.

221212020022002 is an abundant number, since it is smaller than the sum of its proper divisors (258081018404382).

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

221212020022002 is a wasteful number, since it uses less digits than its factorization.

221212020022002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8419974 (or 8419971 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221212020022002 its reverse (200220020212122), we get a palindrome (421432040234124).

The spelling of 221212020022002 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty million, twenty-two thousand, two".