221211010102 has 4 divisors (see below), whose sum is σ = 331816515156. Its totient is φ = 110605505050.

The previous prime is 221211010051. The next prime is 221211010157. The reversal of 221211010102 is 201010112122.

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, 55302752524 + ... + 55302752527.

It is an arithmetic number, because the mean of its divisors is an integer number (82954128789).

Almost surely, 2^221211010102 is an apocalyptic number.

221211010102 is a deficient number, since it is larger than the sum of its proper divisors (110605505054).

221211010102 is a wasteful number, since it uses less digits than its factorization.

221211010102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110605505053.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221211010102 its reverse (201010112122), we get a palindrome (422221122224).

The spelling of 221211010102 in words is "two hundred twenty-one billion, two hundred eleven million, ten thousand, one hundred two".