20120100001 has 4 divisors (see below), whose sum is σ = 20121074352. Its totient is φ = 20119125652.

The previous prime is 20120099983. The next prime is 20120100023. The reversal of 20120100001 is 10000102102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20120100001 - 2¹¹ = 20120097953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120100101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455515 + ... + 497728.

It is an arithmetic number, because the mean of its divisors is an integer number (5030268588).

Almost surely, 2^20120100001 is an apocalyptic number.

It is an amenable number.

20120100001 is a deficient number, since it is larger than the sum of its proper divisors (974351).

20120100001 is an equidigital number, since it uses as much as digits as its factorization.

20120100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974350.

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

Adding to 20120100001 its reverse (10000102102), we get a palindrome (30120202103).

The spelling of 20120100001 in words is "twenty billion, one hundred twenty million, one hundred thousand, one".