221122220102 has 16 divisors (see below), whose sum is σ = 391294620672. Its totient is φ = 91709676360.

The previous prime is 221122220057. The next prime is 221122220107. The reversal of 221122220102 is 201022221122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122220107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254748668 + ... + 254749535.

It is an arithmetic number, because the mean of its divisors is an integer number (24455913792).

Almost surely, 2^221122220102 is an apocalyptic number.

221122220102 is a deficient number, since it is larger than the sum of its proper divisors (170172400570).

221122220102 is a wasteful number, since it uses less digits than its factorization.

221122220102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509498243.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221122220102 its reverse (201022221122), we get a palindrome (422144441224).

The spelling of 221122220102 in words is "two hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one hundred two".