21212201102 has 4 divisors (see below), whose sum is σ = 31818301656. Its totient is φ = 10606100550.

The previous prime is 21212201063. The next prime is 21212201159. The reversal of 21212201102 is 20110221212.

21212201102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5303050274 + ... + 5303050277.

It is an arithmetic number, because the mean of its divisors is an integer number (7954575414).

Almost surely, 2^21212201102 is an apocalyptic number.

21212201102 is a deficient number, since it is larger than the sum of its proper divisors (10606100554).

21212201102 is a wasteful number, since it uses less digits than its factorization.

21212201102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10606100553.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21212201102 its reverse (20110221212), we get a palindrome (41322422314).

It can be divided in two parts, 21212 and 201102, that multiplied together give a palindrome (4265775624).

The spelling of 21212201102 in words is "twenty-one billion, two hundred twelve million, two hundred one thousand, one hundred two".