221112211202212 has 24 divisors (see below), whose sum is σ = 422123692005792. Its totient is φ = 100505460139200.

The previous prime is 221112211202191. The next prime is 221112211202243. The reversal of 221112211202212 is 212202112211122.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 85486387 + ... + 88034917.

It is an arithmetic number, because the mean of its divisors is an integer number (17588487166908).

Almost surely, 2^{221112211202212} is an apocalyptic number.

221112211202212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221112211202212 is a deficient number, since it is larger than the sum of its proper divisors (201011480803580).

221112211202212 is a wasteful number, since it uses less digits than its factorization.

221112211202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520379 (or 4520377 counting only the distinct ones).

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

Adding to 221112211202212 its reverse (212202112211122), we get a palindrome (433314323413334).

The spelling of 221112211202212 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred eleven million, two hundred two thousand, two hundred twelve".