221222210111212 has 12 divisors (see below), whose sum is σ = 387456976879560. Its totient is φ = 110520216717056.

The previous prime is 221222210111141. The next prime is 221222210111233. The reversal of 221222210111212 is 212111012222122.

It is a super-4 number, since 4×221222210111212⁴ (a number of 58 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22722079162 + ... + 22722088897.

It is an arithmetic number, because the mean of its divisors is an integer number (32288081406630).

Almost surely, 2^{221222210111212} is an apocalyptic number.

It is an amenable number.

221222210111212 is a deficient number, since it is larger than the sum of its proper divisors (166234766768348).

221222210111212 is a wasteful number, since it uses less digits than its factorization.

221222210111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45444169280 (or 45444169278 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 221222210111212 its reverse (212111012222122), we get a palindrome (433333222333334).

The spelling of 221222210111212 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, two hundred ten million, one hundred eleven thousand, two hundred twelve".