221212112102 has 4 divisors (see below), whose sum is σ = 331818168156. Its totient is φ = 110606056050.

The previous prime is 221212112083. The next prime is 221212112113. The reversal of 221212112102 is 201211212122.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 55303028024 + ... + 55303028027.

It is an arithmetic number, because the mean of its divisors is an integer number (82954542039).

Almost surely, 2^221212112102 is an apocalyptic number.

221212112102 is a deficient number, since it is larger than the sum of its proper divisors (110606056054).

221212112102 is a wasteful number, since it uses less digits than its factorization.

221212112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110606056053.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221212112102 its reverse (201211212122), we get a palindrome (422423324224).

The spelling of 221212112102 in words is "two hundred twenty-one billion, two hundred twelve million, one hundred twelve thousand, one hundred two".