11920120203 has 4 divisors (see below), whose sum is σ = 15893493608. Its totient is φ = 7946746800.

The previous prime is 11920120181. The next prime is 11920120253. The reversal of 11920120203 is 30202102911.

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

It is not a de Polignac number, because 11920120203 - 2⁹ = 11920119691 is a prime.

It is a super-2 number, since 2×11920120203² (a number of 21 digits) contains 22 as substring.

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 11920120203.

It is not an unprimeable number, because it can be changed into a prime (11920120253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986686698 + ... + 1986686703.

It is an arithmetic number, because the mean of its divisors is an integer number (3973373402).

Almost surely, 2^11920120203 is an apocalyptic number.

11920120203 is a deficient number, since it is larger than the sum of its proper divisors (3973373405).

11920120203 is an equidigital number, since it uses as much as digits as its factorization.

11920120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973373404.

The product of its (nonzero) digits is 216, while the sum is 21.

The spelling of 11920120203 in words is "eleven billion, nine hundred twenty million, one hundred twenty thousand, two hundred three".