1220203021199 has 4 divisors (see below), whose sum is σ = 1224514692936. Its totient is φ = 1215891349464.

The previous prime is 1220203021181. The next prime is 1220203021267. The reversal of 1220203021199 is 9911203020221.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1220203021199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220203021159) 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, 2155835444 + ... + 2155836009.

It is an arithmetic number, because the mean of its divisors is an integer number (306128673234).

Almost surely, 2^{1220203021199} is an apocalyptic number.

1220203021199 is a deficient number, since it is larger than the sum of its proper divisors (4311671737).

1220203021199 is an equidigital number, since it uses as much as digits as its factorization.

1220203021199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4311671736.

The product of its (nonzero) digits is 3888, while the sum is 32.

The spelling of 1220203021199 in words is "one trillion, two hundred twenty billion, two hundred three million, twenty-one thousand, one hundred ninety-nine".