1021201219999 has 4 divisors (see below), whose sum is σ = 1024484825520. Its totient is φ = 1017917614480.

The previous prime is 1021201219981. The next prime is 1021201220021. The reversal of 1021201219999 is 9999121021201.

1021201219999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1021201219999 - 2⁵ = 1021201219967 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 (1021201219919) 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, 1641802294 + ... + 1641802915.

It is an arithmetic number, because the mean of its divisors is an integer number (256121206380).

Almost surely, 2^{1021201219999} is an apocalyptic number.

1021201219999 is a deficient number, since it is larger than the sum of its proper divisors (3283605521).

1021201219999 is an equidigital number, since it uses as much as digits as its factorization.

1021201219999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283605520.

The product of its (nonzero) digits is 52488, while the sum is 46.

The spelling of 1021201219999 in words is "one trillion, twenty-one billion, two hundred one million, two hundred nineteen thousand, nine hundred ninety-nine".