221122101010212 has 72 divisors (see below), whose sum is σ = 577059743350272. Its totient is φ = 71339803272000.

The previous prime is 221122101010163. The next prime is 221122101010271. The reversal of 221122101010212 is 212010101221122.

221122101010212 is a `hidden beast` number, since 2 + 211 + 221 + 0 + 10 + 10 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 434320414 + ... + 434829237.

Almost surely, 2^{221122101010212} is an apocalyptic number.

It is an amenable number.

221122101010212 is an abundant number, since it is smaller than the sum of its proper divisors (355937642340060).

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

221122101010212 is a wasteful number, since it uses less digits than its factorization.

221122101010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869149889 (or 869149884 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221122101010212 its reverse (212010101221122), we get a palindrome (433132202231334).

The spelling of 221122101010212 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, one hundred one million, ten thousand, two hundred twelve".