2123021201 has 4 divisors (see below), whose sum is σ = 2426309952. Its totient is φ = 1819732452.

The previous prime is 2123021191. The next prime is 2123021203. The reversal of 2123021201 is 1021203212.

It is a happy number.

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 2123021201 - 2¹⁴ = 2123004817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2123021203) 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, 151644365 + ... + 151644378.

It is an arithmetic number, because the mean of its divisors is an integer number (606577488).

Almost surely, 2^2123021201 is an apocalyptic number.

It is an amenable number.

2123021201 is a deficient number, since it is larger than the sum of its proper divisors (303288751).

2123021201 is an equidigital number, since it uses as much as digits as its factorization.

2123021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303288750.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2123021201 is about 46076.2541988821. The cubic root of 2123021201 is about 1285.2416086948.

Adding to 2123021201 its reverse (1021203212), we get a palindrome (3144224413).

The spelling of 2123021201 in words is "two billion, one hundred twenty-three million, twenty-one thousand, two hundred one".