1321112221202 has 4 divisors (see below), whose sum is σ = 1981668331806. Its totient is φ = 660556110600.

The previous prime is 1321112221201. The next prime is 1321112221207. The reversal of 1321112221202 is 2021222111231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1321095073321 + 17147881 = 1149389^2 + 4141^2 .

It is not an unprimeable number, because it can be changed into a prime (1321112221201) 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 as a sum of consecutive naturals, namely, 330278055299 + ... + 330278055302.

Almost surely, 2^{1321112221202} is an apocalyptic number.

1321112221202 is a deficient number, since it is larger than the sum of its proper divisors (660556110604).

1321112221202 is an equidigital number, since it uses as much as digits as its factorization.

1321112221202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 660556110603.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1321112221202 its reverse (2021222111231), we get a palindrome (3342334332433).

The spelling of 1321112221202 in words is "one trillion, three hundred twenty-one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred two".