221020122210112 has 28 divisors (see below), whose sum is σ = 438608544541380. Its totient is φ = 110504583428096.

The previous prime is 221020122210061. The next prime is 221020122210119. The reversal of 221020122210112 is 211012221020122.

It can be written as a sum of positive squares in 2 ways, for example, as 70685450911296 + 150334671298816 = 8407464^2 + 12261104^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221020122210112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221020122210119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84287287 + ... + 86869942.

Almost surely, 2^{221020122210112} is an apocalyptic number.

It is an amenable number.

221020122210112 is a deficient number, since it is larger than the sum of its proper divisors (217588422331268).

221020122210112 is a wasteful number, since it uses less digits than its factorization.

221020122210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171177418 (or 171177408 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 221020122210112 its reverse (211012221020122), we get a palindrome (432032343230234).

The spelling of 221020122210112 in words is "two hundred twenty-one trillion, twenty billion, one hundred twenty-two million, two hundred ten thousand, one hundred twelve".