221211010102221 has 12 divisors (see below), whose sum is σ = 319527429874848. Its totient is φ = 147473815065864.

The previous prime is 221211010102217. The next prime is 221211010102253. The reversal of 221211010102221 is 122201010112122.

221211010102221 is a `hidden beast` number, since 221 + 2 + 110 + 10 + 102 + 221 = 666.

It is not a de Polignac number, because 221211010102221 - 2² = 221211010102217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221211010102194 and 221211010102203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211010102261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8477835 + ... + 22678088.

It is an arithmetic number, because the mean of its divisors is an integer number (26627285822904).

Almost surely, 2^{221211010102221} is an apocalyptic number.

It is an amenable number.

221211010102221 is a deficient number, since it is larger than the sum of its proper divisors (98316419772627).

221211010102221 is a wasteful number, since it uses less digits than its factorization.

221211010102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31944832 (or 31944829 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221211010102221 its reverse (122201010112122), we get a palindrome (343412020214343).

Subtracting from 221211010102221 its reverse (122201010112122), we obtain a palindrome (99009999990099).

The spelling of 221211010102221 in words is "two hundred twenty-one trillion, two hundred eleven billion, ten million, one hundred two thousand, two hundred twenty-one".