1221202101222 has 12 divisors (see below), whose sum is σ = 2645937886020. Its totient is φ = 407067367068.

The previous prime is 1221202101199. The next prime is 1221202101227. The reversal of 1221202101222 is 2221012021221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 67844561179 = 1221202101222 / (1 + 2 + 2 + 1 + 2 + 0 + 2 + 1 + 0 + 1 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 1221202101195 and 1221202101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221202101227) 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 5 ways as a sum of consecutive naturals, for example, 33922280572 + ... + 33922280607.

It is an arithmetic number, because the mean of its divisors is an integer number (220494823835).

Almost surely, 2^{1221202101222} is an apocalyptic number.

1221202101222 is an abundant number, since it is smaller than the sum of its proper divisors (1424735784798).

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

1221202101222 is a wasteful number, since it uses less digits than its factorization.

1221202101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67844561187 (or 67844561184 counting only the distinct ones).

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

Adding to 1221202101222 its reverse (2221012021221), we get a palindrome (3442214122443).

The spelling of 1221202101222 in words is "one trillion, two hundred twenty-one billion, two hundred two million, one hundred one thousand, two hundred twenty-two".