221120100012212 has 6 divisors (see below), whose sum is σ = 386960175021378. Its totient is φ = 110560050006104.

The previous prime is 221120100012211. The next prime is 221120100012263. The reversal of 221120100012212 is 212210001021122.

It can be written as a sum of positive squares in only one way, i.e., 111161680968976 + 109958419043236 = 10543324^2 + 10486106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120100012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640012501523 + ... + 27640012501530.

It is an arithmetic number, because the mean of its divisors is an integer number (64493362503563).

Almost surely, 2^{221120100012212} is an apocalyptic number.

It is an amenable number.

221120100012212 is a deficient number, since it is larger than the sum of its proper divisors (165840075009166).

221120100012212 is a wasteful number, since it uses less digits than its factorization.

221120100012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55280025003057 (or 55280025003055 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221120100012212 its reverse (212210001021122), we get a palindrome (433330101033334).

The spelling of 221120100012212 in words is "two hundred twenty-one trillion, one hundred twenty billion, one hundred million, twelve thousand, two hundred twelve".