1221222211022 has 16 divisors (see below), whose sum is σ = 1999024780032. Its totient is φ = 554917348920.

The previous prime is 1221222211021. The next prime is 1221222211051. The reversal of 1221222211022 is 2201122221221.

It is a junction number, because it is equal to n+sod(n) for n = 1221222210985 and 1221222211003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221222211021) 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 in 7 ways as a sum of consecutive naturals, for example, 9114788 + ... + 9247799.

It is an arithmetic number, because the mean of its divisors is an integer number (124939048752).

Almost surely, 2^{1221222211022} is an apocalyptic number.

1221222211022 is a deficient number, since it is larger than the sum of its proper divisors (777802569010).

1221222211022 is a wasteful number, since it uses less digits than its factorization.

1221222211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18365623.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 1221222211022 its reverse (2201122221221), we get a palindrome (3422344432243).

The spelling of 1221222211022 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, twenty-two".