2120210001 has 144 divisors (see below), whose sum is σ = 4064406528. Its totient is φ = 1035763200.

The previous prime is 2120209969. The next prime is 2120210003. The reversal of 2120210001 is 1000120212.

It is not a de Polignac number, because 2120210001 - 2⁵ = 2120209969 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2120210003) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 34757511 + ... + 34757571.

Almost surely, 2^2120210001 is an apocalyptic number.

2120210001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2120210001 is a deficient number, since it is larger than the sum of its proper divisors (1944196527).

2120210001 is a wasteful number, since it uses less digits than its factorization.

2120210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 152 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2120210001 is about 46045.7381415479. The cubic root of 2120210001 is about 1284.6740735970.

Adding to 2120210001 its reverse (1000120212), we get a palindrome (3120330213).

The spelling of 2120210001 in words is "two billion, one hundred twenty million, two hundred ten thousand, one".