221201012102 has 16 divisors (see below), whose sum is σ = 379309823232. Its totient is φ = 94773411720.

The previous prime is 221201012093. The next prime is 221201012129. The reversal of 221201012102 is 201210102122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2200928 + ... + 2299235.

It is an arithmetic number, because the mean of its divisors is an integer number (23706863952).

Almost surely, 2^221201012102 is an apocalyptic number.

221201012102 is a deficient number, since it is larger than the sum of its proper divisors (158108811130).

221201012102 is a wasteful number, since it uses less digits than its factorization.

221201012102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4503683.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221201012102 its reverse (201210102122), we get a palindrome (422411114224).

The spelling of 221201012102 in words is "two hundred twenty-one billion, two hundred one million, twelve thousand, one hundred two".