20211199999 has 8 divisors (see below), whose sum is σ = 20912571360. Its totient is φ = 19510124256.

The previous prime is 20211199997. The next prime is 20211200003. The reversal of 20211199999 is 99999111202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20211199999 - 2¹ = 20211199997 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 (20211199997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69982 + ... + 212884.

It is an arithmetic number, because the mean of its divisors is an integer number (2614071420).

Almost surely, 2^20211199999 is an apocalyptic number.

20211199999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20211199999 is a deficient number, since it is larger than the sum of its proper divisors (701371361).

20211199999 is a wasteful number, since it uses less digits than its factorization.

20211199999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147809.

The product of its (nonzero) digits is 236196, while the sum is 52.

The spelling of 20211199999 in words is "twenty billion, two hundred eleven million, one hundred ninety-nine thousand, nine hundred ninety-nine".