221220112102 has 8 divisors (see below), whose sum is σ = 361996547112. Its totient is φ = 100554596400.

The previous prime is 221220112079. The next prime is 221220112103. The reversal of 221220112102 is 201211022122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220112103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5027729799 + ... + 5027729842.

It is an arithmetic number, because the mean of its divisors is an integer number (45249568389).

Almost surely, 2^221220112102 is an apocalyptic number.

221220112102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221220112102 is a deficient number, since it is larger than the sum of its proper divisors (140776435010).

221220112102 is a wasteful number, since it uses less digits than its factorization.

221220112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055459654.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221220112102 its reverse (201211022122), we get a palindrome (422431134224).

The spelling of 221220112102 in words is "two hundred twenty-one billion, two hundred twenty million, one hundred twelve thousand, one hundred two".