2123502001 has 2 divisors, whose sum is σ = 2123502002. Its totient is φ = 2123502000.

The previous prime is 2123501999. The next prime is 2123502013. The reversal of 2123502001 is 1002053212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1929317776 + 194184225 = 43924^2 + 13935^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123502001 - 2¹ = 2123501999 is a prime.

Together with 2123501999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2123505001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061751000 + 1061751001.

It is an arithmetic number, because the mean of its divisors is an integer number (1061751001).

Almost surely, 2^2123502001 is an apocalyptic number.

It is an amenable number.

2123502001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123502001 is an equidigital number, since it uses as much as digits as its factorization.

2123502001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2123502001 is about 46081.4713415273. The cubic root of 2123502001 is about 1285.3386241371.

Adding to 2123502001 its reverse (1002053212), we get a palindrome (3125555213).

The spelling of 2123502001 in words is "two billion, one hundred twenty-three million, five hundred two thousand, one".