221211011012212 has 48 divisors (see below), whose sum is σ = 417428095064400. Its totient is φ = 101967499975680.

The previous prime is 221211011012203. The next prime is 221211011012231. The reversal of 221211011012212 is 212210110112122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2898152140816 + 218312858871396 = 1702396^2 + 14775414^2 .

It is a super-2 number, since 2×221211011012212² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221211011012212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412607214 + ... + 1412763802.

It is an arithmetic number, because the mean of its divisors is an integer number (8696418647175).

Almost surely, 2^{221211011012212} is an apocalyptic number.

It is an amenable number.

221211011012212 is a deficient number, since it is larger than the sum of its proper divisors (196217084052188).

221211011012212 is a wasteful number, since it uses less digits than its factorization.

221211011012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190996 (or 190994 counting only the distinct ones).

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

Adding to 221211011012212 its reverse (212210110112122), we get a palindrome (433421121124334).

The spelling of 221211011012212 in words is "two hundred twenty-one trillion, two hundred eleven billion, eleven million, twelve thousand, two hundred twelve".