221020121222102 has 16 divisors (see below), whose sum is σ = 352434377775600. Its totient is φ = 103657169930400.

The previous prime is 221020121222077. The next prime is 221020121222167. The reversal of 221020121222102 is 201222121020122.

It is a congruent number.

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, 28793654477 + ... + 28793662152.

It is an arithmetic number, because the mean of its divisors is an integer number (22027148610975).

Almost surely, 2^{221020121222102} is an apocalyptic number.

221020121222102 is a deficient number, since it is larger than the sum of its proper divisors (131414256553498).

221020121222102 is a wasteful number, since it uses less digits than its factorization.

221020121222102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57587316751.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221020121222102 its reverse (201222121020122), we get a palindrome (422242242242224).

The spelling of 221020121222102 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred two".