2150506121 has 2 divisors, whose sum is σ = 2150506122. Its totient is φ = 2150506120.

The previous prime is 2150506109. The next prime is 2150506157. The reversal of 2150506121 is 1216050512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1363086400 + 787419721 = 36920^2 + 28061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2150506121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2150508121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075253060 + 1075253061.

It is an arithmetic number, because the mean of its divisors is an integer number (1075253061).

Almost surely, 2^2150506121 is an apocalyptic number.

It is an amenable number.

2150506121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2150506121 is an equidigital number, since it uses as much as digits as its factorization.

2150506121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 2150506121 is about 46373.5497994277. The cubic root of 2150506121 is about 1290.7641489433.

Adding to 2150506121 its reverse (1216050512), we get a palindrome (3366556633).

The spelling of 2150506121 in words is "two billion, one hundred fifty million, five hundred six thousand, one hundred twenty-one".