2125121213 has 2 divisors, whose sum is σ = 2125121214. Its totient is φ = 2125121212.

The previous prime is 2125121203. The next prime is 2125121237. The reversal of 2125121213 is 3121215212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1565230969 + 559890244 = 39563^2 + 23662^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125121213 - 2²⁰ = 2124072637 is a prime.

It is a super-2 number, since 2×2125121213² = 9032280339885182738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125121203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062560606 + 1062560607.

It is an arithmetic number, because the mean of its divisors is an integer number (1062560607).

Almost surely, 2^2125121213 is an apocalyptic number.

It is an amenable number.

2125121213 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125121213 is an equidigital number, since it uses as much as digits as its factorization.

2125121213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 20.

The square root of 2125121213 is about 46099.0370072955. The cubic root of 2125121213 is about 1285.6652397863.

Adding to 2125121213 its reverse (3121215212), we get a palindrome (5246336425).

The spelling of 2125121213 in words is "two billion, one hundred twenty-five million, one hundred twenty-one thousand, two hundred thirteen".