2120020001 has 4 divisors (see below), whose sum is σ = 2312749104. Its totient is φ = 1927290900.

The previous prime is 2120019989. The next prime is 2120020061. The reversal of 2120020001 is 1000200212.

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 2120020001 - 2²² = 2115825697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2120020061) 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, 96364535 + ... + 96364556.

It is an arithmetic number, because the mean of its divisors is an integer number (578187276).

Almost surely, 2^2120020001 is an apocalyptic number.

It is an amenable number.

2120020001 is a deficient number, since it is larger than the sum of its proper divisors (192729103).

2120020001 is a wasteful number, since it uses less digits than its factorization.

2120020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192729102.

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

The square root of 2120020001 is about 46043.6749293538. The cubic root of 2120020001 is about 1284.6356976239.

Adding to 2120020001 its reverse (1000200212), we get a palindrome (3120220213).

The spelling of 2120020001 in words is "two billion, one hundred twenty million, twenty thousand, one".