2125410121 has 2 divisors, whose sum is σ = 2125410122. Its totient is φ = 2125410120.

The previous prime is 2125410083. The next prime is 2125410163. The reversal of 2125410121 is 1210145212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1330790400 + 794619721 = 36480^2 + 28189^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125410121 - 2¹⁷ = 2125279049 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2125411121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062705060 + 1062705061.

It is an arithmetic number, because the mean of its divisors is an integer number (1062705061).

Almost surely, 2^2125410121 is an apocalyptic number.

It is an amenable number.

2125410121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125410121 is an equidigital number, since it uses as much as digits as its factorization.

2125410121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2125410121 is about 46102.1704586671. The cubic root of 2125410121 is about 1285.7234987600.

Adding to 2125410121 its reverse (1210145212), we get a palindrome (3335555333).

It can be divided in two parts, 21254 and 10121, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 2125410121 in words is "two billion, one hundred twenty-five million, four hundred ten thousand, one hundred twenty-one".