221220222011212 has 12 divisors (see below), whose sum is σ = 400484884675680. Its totient is φ = 106795969246736.

The previous prime is 221220222011153. The next prime is 221220222011227. The reversal of 221220222011212 is 212110222022122.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 953535439588 + ... + 953535439819.

It is an arithmetic number, because the mean of its divisors is an integer number (33373740389640).

Almost surely, 2^{221220222011212} is an apocalyptic number.

It is an amenable number.

221220222011212 is a deficient number, since it is larger than the sum of its proper divisors (179264662664468).

221220222011212 is a wasteful number, since it uses less digits than its factorization.

221220222011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907070879440 (or 1907070879438 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221220222011212 its reverse (212110222022122), we get a palindrome (433330444033334).

The spelling of 221220222011212 in words is "two hundred twenty-one trillion, two hundred twenty billion, two hundred twenty-two million, eleven thousand, two hundred twelve".