221202102111212 has 6 divisors (see below), whose sum is σ = 387103678694628. Its totient is φ = 110601051055604.

The previous prime is 221202102111163. The next prime is 221202102111253. The reversal of 221202102111212 is 212111201202122.

It is a super-2 number, since 2×221202102111212² (a number of 29 digits) contains 22 as substring.

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, 27650262763898 + ... + 27650262763905.

It is an arithmetic number, because the mean of its divisors is an integer number (64517279782438).

Almost surely, 2^{221202102111212} is an apocalyptic number.

It is an amenable number.

221202102111212 is a deficient number, since it is larger than the sum of its proper divisors (165901576583416).

221202102111212 is a wasteful number, since it uses less digits than its factorization.

221202102111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55300525527807 (or 55300525527805 counting only the distinct ones).

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

Adding to 221202102111212 its reverse (212111201202122), we get a palindrome (433313303313334).

The spelling of 221202102111212 in words is "two hundred twenty-one trillion, two hundred two billion, one hundred two million, one hundred eleven thousand, two hundred twelve".