20021113211 has 8 divisors (see below), whose sum is σ = 21875835648. Its totient is φ = 18172161000.

The previous prime is 20021113207. The next prime is 20021113243. The reversal of 20021113211 is 11231112002.

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 20021113211 - 2² = 20021113207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021113291) 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, 1435295 + ... + 1449176.

It is an arithmetic number, because the mean of its divisors is an integer number (2734479456).

Almost surely, 2^20021113211 is an apocalyptic number.

20021113211 is a deficient number, since it is larger than the sum of its proper divisors (1854722437).

20021113211 is a wasteful number, since it uses less digits than its factorization.

20021113211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885113.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20021113211 its reverse (11231112002), we get a palindrome (31252225213).

The spelling of 20021113211 in words is "twenty billion, twenty-one million, one hundred thirteen thousand, two hundred eleven".