2121294029 has 2 divisors, whose sum is σ = 2121294030. Its totient is φ = 2121294028.

The previous prime is 2121293927. The next prime is 2121294041. The reversal of 2121294029 is 9204921212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1866412804 + 254881225 = 43202^2 + 15965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121294029 - 2⁸ = 2121293773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2121293986 and 2121294004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121294829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060647014 + 1060647015.

It is an arithmetic number, because the mean of its divisors is an integer number (1060647015).

Almost surely, 2^2121294029 is an apocalyptic number.

It is an amenable number.

2121294029 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121294029 is an equidigital number, since it uses as much as digits as its factorization.

2121294029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2121294029 is about 46057.5078461699. The cubic root of 2121294029 is about 1284.8929804336.

The spelling of 2121294029 in words is "two billion, one hundred twenty-one million, two hundred ninety-four thousand, twenty-nine".