221101202102122 has 4 divisors (see below), whose sum is σ = 331651803153186. Its totient is φ = 110550601051060.

The previous prime is 221101202102111. The next prime is 221101202102171. The reversal of 221101202102122 is 221201202101122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 219529887204681 + 1571314897441 = 14816541^2 + 1253521^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221101202102122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55275300525529 + ... + 55275300525532.

Almost surely, 2^{221101202102122} is an apocalyptic number.

221101202102122 is a deficient number, since it is larger than the sum of its proper divisors (110550601051064).

221101202102122 is a wasteful number, since it uses less digits than its factorization.

221101202102122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110550601051063.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221101202102122 its reverse (221201202101122), we get a palindrome (442302404203244).

The spelling of 221101202102122 in words is "two hundred twenty-one trillion, one hundred one billion, two hundred two million, one hundred two thousand, one hundred twenty-two".