212102102220 has 24 divisors (see below), whose sum is σ = 593885886384. Its totient is φ = 56560560576.

The previous prime is 212102102183. The next prime is 212102102237. The reversal of 212102102220 is 22201201212.

It is a super-2 number, since 2×212102102220² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212102102220.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1767517459 + ... + 1767517578.

It is an arithmetic number, because the mean of its divisors is an integer number (24745245266).

Almost surely, 2^212102102220 is an apocalyptic number.

212102102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102102220 is an abundant number, since it is smaller than the sum of its proper divisors (381783784164).

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

212102102220 is a wasteful number, since it uses less digits than its factorization.

212102102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535035049 (or 3535035047 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212102102220 its reverse (22201201212), we get a palindrome (234303303432).

The spelling of 212102102220 in words is "two hundred twelve billion, one hundred two million, one hundred two thousand, two hundred twenty".