2121501037 has 2 divisors, whose sum is σ = 2121501038. Its totient is φ = 2121501036.

The previous prime is 2121501023. The next prime is 2121501047. The reversal of 2121501037 is 7301051212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1768286601 + 353214436 = 42051^2 + 18794^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121501037 - 2¹⁹ = 2120976749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121500999 and 2121501017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121501017) 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, 1060750518 + 1060750519.

It is an arithmetic number, because the mean of its divisors is an integer number (1060750519).

Almost surely, 2^2121501037 is an apocalyptic number.

It is an amenable number.

2121501037 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121501037 is an equidigital number, since it uses as much as digits as its factorization.

2121501037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 2121501037 is about 46059.7550688234. The cubic root of 2121501037 is about 1284.9347748086.

Adding to 2121501037 its reverse (7301051212), we get a palindrome (9422552249).

The spelling of 2121501037 in words is "two billion, one hundred twenty-one million, five hundred one thousand, thirty-seven".