21212212201102 has 16 divisors (see below), whose sum is σ = 34777312314192. Its totient is φ = 9644128623360.

The previous prime is 21212212201097. The next prime is 21212212201129. The reversal of 21212212201102 is 20110221221212.

It is a self number, because there is not a number n which added to its sum of digits gives 21212212201102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6088463299 + ... + 6088466782.

It is an arithmetic number, because the mean of its divisors is an integer number (2173582019637).

Almost surely, 2^{21212212201102} is an apocalyptic number.

21212212201102 is a deficient number, since it is larger than the sum of its proper divisors (13565100113090).

21212212201102 is a wasteful number, since it uses less digits than its factorization.

21212212201102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12176930163.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21212212201102 its reverse (20110221221212), we get a palindrome (41322433422314).

The spelling of 21212212201102 in words is "twenty-one trillion, two hundred twelve billion, two hundred twelve million, two hundred one thousand, one hundred two".