221101011122212 has 24 divisors (see below), whose sum is σ = 416803077882296. Its totient is φ = 102019017881088.

The previous prime is 221101011122111. The next prime is 221101011122239. The reversal of 221101011122212 is 212221110101122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 419468656896 + 220681542465316 = 647664^2 + 14855354^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221101011122212.

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, 574860843 + ... + 575245330.

Almost surely, 2^{221101011122212} is an apocalyptic number.

It is an amenable number.

221101011122212 is a deficient number, since it is larger than the sum of its proper divisors (195702066760084).

221101011122212 is a wasteful number, since it uses less digits than its factorization.

221101011122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1150109887 (or 1150109885 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221101011122212 its reverse (212221110101122), we get a palindrome (433322121223334).

The spelling of 221101011122212 in words is "two hundred twenty-one trillion, one hundred one billion, eleven million, one hundred twenty-two thousand, two hundred twelve".