20100102001 has 16 divisors (see below), whose sum is σ = 23149952640. Its totient is φ = 17094971520.

The previous prime is 20100101993. The next prime is 20100102007. The reversal of 20100102001 is 10020100102.

It is a cyclic number.

It is not a de Polignac number, because 20100102001 - 2³ = 20100101993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20100102007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3093366 + ... + 3099856.

It is an arithmetic number, because the mean of its divisors is an integer number (1446872040).

Almost surely, 2^20100102001 is an apocalyptic number.

It is an amenable number.

20100102001 is a deficient number, since it is larger than the sum of its proper divisors (3049850639).

20100102001 is a wasteful number, since it uses less digits than its factorization.

20100102001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9864.

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 20100102001 its reverse (10020100102), we get a palindrome (30120202103).

The spelling of 20100102001 in words is "twenty billion, one hundred million, one hundred two thousand, one".