221212021122102 has 16 divisors (see below), whose sum is σ = 442498361825520. Its totient is φ = 73724953777152.

The previous prime is 221212021122077. The next prime is 221212021122109. The reversal of 221212021122102 is 201221120212122.

221212021122102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212021122109) 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, 3096610527 + ... + 3096681962.

It is an arithmetic number, because the mean of its divisors is an integer number (27656147614095).

Almost surely, 2^{221212021122102} is an apocalyptic number.

221212021122102 is an abundant number, since it is smaller than the sum of its proper divisors (221286340703418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212021122102 is a wasteful number, since it uses less digits than its factorization.

221212021122102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193298447.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221212021122102 its reverse (201221120212122), we get a palindrome (422433141334224).

The spelling of 221212021122102 in words is "two hundred twenty-one trillion, two hundred twelve billion, twenty-one million, one hundred twenty-two thousand, one hundred two".