210212221202420 has 24 divisors (see below), whose sum is σ = 441473652613224. Its totient is φ = 84079557416576.

The previous prime is 210212221202299. The next prime is 210212221202443. The reversal of 210212221202420 is 24202122212012.

It can be written as a sum of positive squares in 4 ways, for example, as 28714958345956 + 181497262856464 = 5358634^2 + 13472092^2 .

It is a super-2 number, since 2×210212221202420² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332868179 + ... + 333499098.

It is an arithmetic number, because the mean of its divisors is an integer number (18394735525551).

Almost surely, 2^{210212221202420} is an apocalyptic number.

210212221202420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210212221202420 is an abundant number, since it is smaller than the sum of its proper divisors (231261431410804).

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

210212221202420 is a wasteful number, since it uses less digits than its factorization.

210212221202420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666383059 (or 666383057 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 210212221202420 its reverse (24202122212012), we get a palindrome (234414343414432).

The spelling of 210212221202420 in words is "two hundred ten trillion, two hundred twelve billion, two hundred twenty-one million, two hundred two thousand, four hundred twenty".