2102020001 has 4 divisors (see below), whose sum is σ = 2102503104. Its totient is φ = 2101536900.

The previous prime is 2102019977. The next prime is 2102020003. The reversal of 2102020001 is 1000202012.

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 a de Polignac number, because none of the positive numbers 2^k-2102020001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2102020003) 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, 234965 + ... + 243746.

It is an arithmetic number, because the mean of its divisors is an integer number (525625776).

Almost surely, 2^2102020001 is an apocalyptic number.

It is an amenable number.

2102020001 is a deficient number, since it is larger than the sum of its proper divisors (483103).

2102020001 is an equidigital number, since it uses as much as digits as its factorization.

2102020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483102.

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

The square root of 2102020001 is about 45847.7916698285. The cubic root of 2102020001 is about 1280.9896320077.

Adding to 2102020001 its reverse (1000202012), we get a palindrome (3102222013).

The spelling of 2102020001 in words is "two billion, one hundred two million, twenty thousand, one".