1202211221111 has 4 divisors (see below), whose sum is σ = 1224894451752. Its totient is φ = 1179527990472.

The previous prime is 1202211221089. The next prime is 1202211221131. The reversal of 1202211221111 is 1111221122021.

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

It is a cyclic number.

It is not a de Polignac number, because 1202211221111 - 2³⁰ = 1201137479287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1202211221111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202211221131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11341615241 + ... + 11341615346.

It is an arithmetic number, because the mean of its divisors is an integer number (306223612938).

Almost surely, 2^{1202211221111} is an apocalyptic number.

1202211221111 is a deficient number, since it is larger than the sum of its proper divisors (22683230641).

1202211221111 is an equidigital number, since it uses as much as digits as its factorization.

1202211221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22683230640.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 1202211221111 its reverse (1111221122021), we get a palindrome (2313432343132).

The spelling of 1202211221111 in words is "one trillion, two hundred two billion, two hundred eleven million, two hundred twenty-one thousand, one hundred eleven".