221212102222012 has 12 divisors (see below), whose sum is σ = 422314013333016. Its totient is φ = 100550955555440.

The previous prime is 221212102221937. The next prime is 221212102222081. The reversal of 221212102222012 is 210222201212122.

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

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 2513773888843 + ... + 2513773888930.

It is an arithmetic number, because the mean of its divisors is an integer number (35192834444418).

Almost surely, 2^{221212102222012} is an apocalyptic number.

221212102222012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221212102222012 is a deficient number, since it is larger than the sum of its proper divisors (201101911111004).

221212102222012 is a wasteful number, since it uses less digits than its factorization.

221212102222012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027547777788 (or 5027547777786 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221212102222012 its reverse (210222201212122), we get a palindrome (431434303434134).

The spelling of 221212102222012 in words is "two hundred twenty-one trillion, two hundred twelve billion, one hundred two million, two hundred twenty-two thousand, twelve".