20002100001 has 8 divisors (see below), whose sum is σ = 28720964160. Its totient is φ = 12308984592.

The previous prime is 20002099993. The next prime is 20002100003. The reversal of 20002100001 is 10000120002.

It is a happy number.

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

It is not a de Polignac number, because 20002100001 - 2³ = 20002099993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20002100003) 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, 256437141 + ... + 256437218.

It is an arithmetic number, because the mean of its divisors is an integer number (3590120520).

Almost surely, 2^20002100001 is an apocalyptic number.

It is an amenable number.

20002100001 is a deficient number, since it is larger than the sum of its proper divisors (8718864159).

20002100001 is a wasteful number, since it uses less digits than its factorization.

20002100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512874375.

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 20002100001 its reverse (10000120002), we get a palindrome (30002220003).

It can be divided in two parts, 20002 and 100001, that multiplied together give a palindrome (2000220002).

The spelling of 20002100001 in words is "twenty billion, two million, one hundred thousand, one".