1011220020099 has 20 divisors (see below), whose sum is σ = 1590092561640. Its totient is φ = 638665274880.

The previous prime is 1011220020077. The next prime is 1011220020103. The reversal of 1011220020099 is 9900200221101.

It is not a de Polignac number, because 1011220020099 - 2³³ = 1002630085507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1011220020029) 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 19 ways as a sum of consecutive naturals, for example, 328529982 + ... + 328533059.

It is an arithmetic number, because the mean of its divisors is an integer number (79504628082).

Almost surely, 2^{1011220020099} is an apocalyptic number.

1011220020099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1011220020099 is a deficient number, since it is larger than the sum of its proper divisors (578872541541).

1011220020099 is an equidigital number, since it uses as much as digits as its factorization.

1011220020099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657063072 (or 657063063 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The spelling of 1011220020099 in words is "one trillion, eleven billion, two hundred twenty million, twenty thousand, ninety-nine".