20001120999 has 4 divisors (see below), whose sum is σ = 26668161336. Its totient is φ = 13334080664.

The previous prime is 20001120977. The next prime is 20001121031. The reversal of 20001120999 is 99902110002.

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 20001120999 - 2⁵ = 20001120967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001120929) 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, 3333520164 + ... + 3333520169.

It is an arithmetic number, because the mean of its divisors is an integer number (6667040334).

Almost surely, 2^20001120999 is an apocalyptic number.

20001120999 is a deficient number, since it is larger than the sum of its proper divisors (6667040337).

20001120999 is an equidigital number, since it uses as much as digits as its factorization.

20001120999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6667040336.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 20001120999 in words is "twenty billion, one million, one hundred twenty thousand, nine hundred ninety-nine".