1221102201222 has 96 divisors (see below), whose sum is σ = 2746903850496. Its totient is φ = 391817088000.

The previous prime is 1221102201113. The next prime is 1221102201227. The reversal of 1221102201222 is 2221022011221.

It is a happy number.

1221102201222 is a `hidden beast` number, since 1 + 221 + 1 + 0 + 220 + 1 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1221102201195 and 1221102201204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221102201227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13255722 + ... + 13347522.

It is an arithmetic number, because the mean of its divisors is an integer number (28613581776).

Almost surely, 2^{1221102201222} is an apocalyptic number.

1221102201222 is an abundant number, since it is smaller than the sum of its proper divisors (1525801649274).

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

1221102201222 is a wasteful number, since it uses less digits than its factorization.

1221102201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92126 (or 92123 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1221102201222 its reverse (2221022011221), we get a palindrome (3442124212443).

The spelling of 1221102201222 in words is "one trillion, two hundred twenty-one billion, one hundred two million, two hundred one thousand, two hundred twenty-two".