21212010020222 has 12 divisors (see below), whose sum is σ = 37012792994640. Its totient is φ = 9090861437196.

The previous prime is 21212010020189. The next prime is 21212010020233. The reversal of 21212010020222 is 22202001021212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21212010020222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 108224540822 + ... + 108224541017.

It is an arithmetic number, because the mean of its divisors is an integer number (3084399416220).

Almost surely, 2^{21212010020222} is an apocalyptic number.

21212010020222 is a deficient number, since it is larger than the sum of its proper divisors (15800782974418).

21212010020222 is a wasteful number, since it uses less digits than its factorization.

21212010020222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216449081855 (or 216449081848 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21212010020222 its reverse (22202001021212), we get a palindrome (43414011041434).

The spelling of 21212010020222 in words is "twenty-one trillion, two hundred twelve billion, ten million, twenty thousand, two hundred twenty-two".