2121503929 has 2 divisors, whose sum is σ = 2121503930. Its totient is φ = 2121503928.

The previous prime is 2121503893. The next prime is 2121503953. The reversal of 2121503929 is 9293051212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1152738304 + 968765625 = 33952^2 + 31125^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121503929 - 2⁷ = 2121503801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121503894 and 2121503903.

It is not a weakly prime, because it can be changed into another prime (2121503129) 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 as a sum of consecutive naturals, namely, 1060751964 + 1060751965.

It is an arithmetic number, because the mean of its divisors is an integer number (1060751965).

Almost surely, 2^2121503929 is an apocalyptic number.

It is an amenable number.

2121503929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121503929 is an equidigital number, since it uses as much as digits as its factorization.

2121503929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2121503929 is about 46059.7864628137. The cubic root of 2121503929 is about 1284.9353586766.

The spelling of 2121503929 in words is "two billion, one hundred twenty-one million, five hundred three thousand, nine hundred twenty-nine".