21212022212102 has 16 divisors (see below), whose sum is σ = 32217847275600. Its totient is φ = 10473293930400.

The previous prime is 21212022212033. The next prime is 21212022212119. The reversal of 21212022212102 is 20121222021212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138459077 + ... + 138612192.

It is an arithmetic number, because the mean of its divisors is an integer number (2013615454725).

Almost surely, 2^{21212022212102} is an apocalyptic number.

21212022212102 is a deficient number, since it is larger than the sum of its proper divisors (11005825063498).

21212022212102 is a wasteful number, since it uses less digits than its factorization.

21212022212102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277071751.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21212022212102 its reverse (20121222021212), we get a palindrome (41333244233314).

The spelling of 21212022212102 in words is "twenty-one trillion, two hundred twelve billion, twenty-two million, two hundred twelve thousand, one hundred two".