2121002051 has 16 divisors (see below), whose sum is σ = 2503907328. Its totient is φ = 1758153600.

The previous prime is 2121002027. The next prime is 2121002069. The reversal of 2121002051 is 1502001212.

It is a de Polignac number, because none of the positive numbers 2^k-2121002051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121002011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466676 + ... + 471198.

It is an arithmetic number, because the mean of its divisors is an integer number (156494208).

Almost surely, 2^2121002051 is an apocalyptic number.

2121002051 is a deficient number, since it is larger than the sum of its proper divisors (382905277).

2121002051 is a wasteful number, since it uses less digits than its factorization.

2121002051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6722.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 2121002051 is about 46054.3380258581. The cubic root of 2121002051 is about 1284.8340262148.

Adding to 2121002051 its reverse (1502001212), we get a palindrome (3623003263).

The spelling of 2121002051 in words is "two billion, one hundred twenty-one million, two thousand, fifty-one".