221122221001212 has 72 divisors (see below), whose sum is σ = 530398519101696. Its totient is φ = 71698390287552.

The previous prime is 221122221001189. The next prime is 221122221001259. The reversal of 221122221001212 is 212100122221122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68117853 + ... + 71290155.

Almost surely, 2^{221122221001212} is an apocalyptic number.

It is an amenable number.

221122221001212 is an abundant number, since it is smaller than the sum of its proper divisors (309276298100484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221122221001212 is a wasteful number, since it uses less digits than its factorization.

221122221001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3176627 (or 3176588 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 221122221001212 its reverse (212100122221122), we get a palindrome (433222343222334).

The spelling of 221122221001212 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, two hundred twenty-one million, one thousand, two hundred twelve".