221100102212 has 18 divisors (see below), whose sum is σ = 425297924814. Its totient is φ = 100500046240.

The previous prime is 221100102187. The next prime is 221100102259. The reversal of 221100102212 is 212201001122.

It can be written as a sum of positive squares in only one way, i.e., 116626348036 + 104473754176 = 341506^2 + 323224^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 228408713 + ... + 228409680.

Almost surely, 2^221100102212 is an apocalyptic number.

221100102212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221100102212 is a deficient number, since it is larger than the sum of its proper divisors (204197822602).

221100102212 is a wasteful number, since it uses less digits than its factorization.

221100102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456818419 (or 456818406 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221100102212 its reverse (212201001122), we get a palindrome (433301103334).

The spelling of 221100102212 in words is "two hundred twenty-one billion, one hundred million, one hundred two thousand, two hundred twelve".