221022221102 has 4 divisors (see below), whose sum is σ = 331533331656. Its totient is φ = 110511110550.

The previous prime is 221022221099. The next prime is 221022221131. The reversal of 221022221102 is 201122220122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 201122220122 = 2 ⋅100561110061.

It is a super-2 number, since 2×221022221102² (a number of 23 digits) contains 22 as substring.

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, 55255555274 + ... + 55255555277.

It is an arithmetic number, because the mean of its divisors is an integer number (82883332914).

Almost surely, 2^221022221102 is an apocalyptic number.

221022221102 is a deficient number, since it is larger than the sum of its proper divisors (110511110554).

221022221102 is a wasteful number, since it uses less digits than its factorization.

221022221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110511110553.

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

Adding to 221022221102 its reverse (201122220122), we get a palindrome (422144441224).

The spelling of 221022221102 in words is "two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred two".