1201222221099 has 24 divisors (see below), whose sum is σ = 1633878123696. Its totient is φ = 784996214400.

The previous prime is 1201222221053. The next prime is 1201222221161. The reversal of 1201222221099 is 9901222221021.

It is not a de Polignac number, because 1201222221099 - 2¹² = 1201222217003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201222221019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3087129 + ... + 3454389.

It is an arithmetic number, because the mean of its divisors is an integer number (68078255154).

Almost surely, 2^{1201222221099} is an apocalyptic number.

1201222221099 is a deficient number, since it is larger than the sum of its proper divisors (432655902597).

1201222221099 is an equidigital number, since it uses as much as digits as its factorization.

1201222221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367679 (or 367618 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The spelling of 1201222221099 in words is "one trillion, two hundred one billion, two hundred twenty-two million, two hundred twenty-one thousand, ninety-nine".