221021121221102 has 8 divisors (see below), whose sum is σ = 331932566576376. Its totient is φ = 110376932362312.

The previous prime is 221021121221101. The next prime is 221021121221113. The reversal of 221021121221102 is 201122121120122.

221021121221102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (221021121221101) 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, 66814122053 + ... + 66814125360.

It is an arithmetic number, because the mean of its divisors is an integer number (41491570822047).

Almost surely, 2^{221021121221102} is an apocalyptic number.

221021121221102 is a deficient number, since it is larger than the sum of its proper divisors (110911445355274).

221021121221102 is a wasteful number, since it uses less digits than its factorization.

221021121221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133628248242.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 221021121221102 its reverse (201122121120122), we get a palindrome (422143242341224).

The spelling of 221021121221102 in words is "two hundred twenty-one trillion, twenty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".