1021011220199 has 4 divisors (see below), whose sum is σ = 1021028513736. Its totient is φ = 1020993926664.

The previous prime is 1021011220169. The next prime is 1021011220241. The reversal of 1021011220199 is 9910221101201.

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-1021011220199 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 (1021011220139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8557904 + ... + 8676389.

It is an arithmetic number, because the mean of its divisors is an integer number (255257128434).

Almost surely, 2^{1021011220199} is an apocalyptic number.

1021011220199 is a deficient number, since it is larger than the sum of its proper divisors (17293537).

1021011220199 is an equidigital number, since it uses as much as digits as its factorization.

1021011220199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17293536.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 1021011220199 in words is "one trillion, twenty-one billion, eleven million, two hundred twenty thousand, one hundred ninety-nine".