221122101211212 has 48 divisors (see below), whose sum is σ = 516459972188160. Its totient is φ = 73634770328448.

The previous prime is 221122101211177. The next prime is 221122101211223. The reversal of 221122101211212 is 212112101221122.

It is a super-2 number, since 2×221122101211212² (a number of 29 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 52962853 + ... + 56985155.

It is an arithmetic number, because the mean of its divisors is an integer number (10759582753920).

Almost surely, 2^{221122101211212} is an apocalyptic number.

It is an amenable number.

221122101211212 is an abundant number, since it is smaller than the sum of its proper divisors (295337870976948).

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

221122101211212 is a wasteful number, since it uses less digits than its factorization.

221122101211212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026822 (or 4026820 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221122101211212 its reverse (212112101221122), we get a palindrome (433234202432334).

The spelling of 221122101211212 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, one hundred one million, two hundred eleven thousand, two hundred twelve".