221102211212 has 24 divisors (see below), whose sum is σ = 393242724000. Its totient is φ = 108759632256.

The previous prime is 221102211199. The next prime is 221102211271. The reversal of 221102211212 is 212112201122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1489643 + ... + 1631330.

It is an arithmetic number, because the mean of its divisors is an integer number (16385113500).

Almost surely, 2^221102211212 is an apocalyptic number.

It is an amenable number.

221102211212 is a deficient number, since it is larger than the sum of its proper divisors (172140512788).

221102211212 is a wasteful number, since it uses less digits than its factorization.

221102211212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121265 (or 3121263 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221102211212 its reverse (212112201122), we get a palindrome (433214412334).

It can be divided in two parts, 22110 and 2211212, that added together give a palindrome (2233322).

The spelling of 221102211212 in words is "two hundred twenty-one billion, one hundred two million, two hundred eleven thousand, two hundred twelve".