10135420121 has 2 divisors, whose sum is σ = 10135420122. Its totient is φ = 10135420120.

The previous prime is 10135420117. The next prime is 10135420133. The reversal of 10135420121 is 12102453101.

10135420121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8452779721 + 1682640400 = 91939^2 + 41020^2 .

It is a cyclic number.

It is not a de Polignac number, because 10135420121 - 2² = 10135420117 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 = 10135420093 and 10135420102.

It is not a weakly prime, because it can be changed into another prime (10135920121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5067710060 + 5067710061.

It is an arithmetic number, because the mean of its divisors is an integer number (5067710061).

Almost surely, 2^10135420121 is an apocalyptic number.

It is an amenable number.

10135420121 is a deficient number, since it is larger than the sum of its proper divisors (1).

10135420121 is an equidigital number, since it uses as much as digits as its factorization.

10135420121 is an evil number, because the sum of its binary digits is even.

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

Adding to 10135420121 its reverse (12102453101), we get a palindrome (22237873222).

The spelling of 10135420121 in words is "ten billion, one hundred thirty-five million, four hundred twenty thousand, one hundred twenty-one".