20021110001 has 8 divisors (see below), whose sum is σ = 21200148864. Its totient is φ = 18842218560.

The previous prime is 20021109991. The next prime is 20021110033. The reversal of 20021110001 is 10001112002.

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 20021110001 - 2¹⁸ = 20020847857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20021110061) 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, 373196 + ... + 423458.

It is an arithmetic number, because the mean of its divisors is an integer number (2650018608).

Almost surely, 2^20021110001 is an apocalyptic number.

It is an amenable number.

20021110001 is a deficient number, since it is larger than the sum of its proper divisors (1179038863).

20021110001 is a wasteful number, since it uses less digits than its factorization.

20021110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73711.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 20021110001 its reverse (10001112002), we get a palindrome (30022222003).

The spelling of 20021110001 in words is "twenty billion, twenty-one million, one hundred ten thousand, one".