1221211010222 has 128 divisors (see below), whose sum is σ = 2214978048000. Its totient is φ = 504498129408.

The previous prime is 1221211010207. The next prime is 1221211010231. The reversal of 1221211010222 is 2220101121221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221211010222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 652007078 + ... + 652008950.

It is an arithmetic number, because the mean of its divisors is an integer number (17304516000).

Almost surely, 2^{1221211010222} is an apocalyptic number.

1221211010222 is a deficient number, since it is larger than the sum of its proper divisors (993767037778).

1221211010222 is a wasteful number, since it uses less digits than its factorization.

1221211010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255 (or 2241 counting only the distinct ones).

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

Adding to 1221211010222 its reverse (2220101121221), we get a palindrome (3441312131443).

The spelling of 1221211010222 in words is "one trillion, two hundred twenty-one billion, two hundred eleven million, ten thousand, two hundred twenty-two".