221201021100122 has 16 divisors (see below), whose sum is σ = 384001772616960. Its totient is φ = 93600432074448.

The previous prime is 221201021100109. The next prime is 221201021100139. The reversal of 221201021100122 is 221001120102122.

It is a self number, because there is not a number n which added to its sum of digits gives 221201021100122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100000460513 + ... + 100000462724.

It is an arithmetic number, because the mean of its divisors is an integer number (24000110788560).

Almost surely, 2^{221201021100122} is an apocalyptic number.

221201021100122 is a deficient number, since it is larger than the sum of its proper divisors (162800751516838).

221201021100122 is a wasteful number, since it uses less digits than its factorization.

221201021100122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200000923325.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221201021100122 its reverse (221001120102122), we get a palindrome (442202141202244).

The spelling of 221201021100122 in words is "two hundred twenty-one trillion, two hundred one billion, twenty-one million, one hundred thousand, one hundred twenty-two".