221212101221102 has 4 divisors (see below), whose sum is σ = 331818151831656. Its totient is φ = 110606050610550.

The previous prime is 221212101221101. The next prime is 221212101221113. The reversal of 221212101221102 is 201122101212122.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212101221101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55303025305274 + ... + 55303025305277.

It is an arithmetic number, because the mean of its divisors is an integer number (82954537957914).

Almost surely, 2^{221212101221102} is an apocalyptic number.

221212101221102 is a deficient number, since it is larger than the sum of its proper divisors (110606050610554).

221212101221102 is a wasteful number, since it uses less digits than its factorization.

221212101221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110606050610553.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221212101221102 its reverse (201122101212122), we get a palindrome (422334202433224).

The spelling of 221212101221102 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred two".