1221012222202 has 16 divisors (see below), whose sum is σ = 1833165028800. Its totient is φ = 609957376128.

The previous prime is 1221012222193. The next prime is 1221012222203. The reversal of 1221012222202 is 2022222101221.

It is a self number, because there is not a number n which added to its sum of digits gives 1221012222202.

It is not an unprimeable number, because it can be changed into a prime (1221012222203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16350633 + ... + 16425139.

It is an arithmetic number, because the mean of its divisors is an integer number (114572814300).

Almost surely, 2^{1221012222202} is an apocalyptic number.

1221012222202 is a deficient number, since it is larger than the sum of its proper divisors (612152806598).

1221012222202 is a wasteful number, since it uses less digits than its factorization.

1221012222202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81765.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 1221012222202 its reverse (2022222101221), we get a palindrome (3243234323423).

The spelling of 1221012222202 in words is "one trillion, two hundred twenty-one billion, twelve million, two hundred twenty-two thousand, two hundred two".