12121402525213 has 4 divisors (see below), whose sum is σ = 12121409653408. Its totient is φ = 12121395397020.

The previous prime is 12121402525187. The next prime is 12121402525217. The reversal of 12121402525213 is 31252520412121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12121402525213 - 2⁵ = 12121402525181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121402525217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638320 + ... + 4964902.

It is an arithmetic number, because the mean of its divisors is an integer number (3030352413352).

Almost surely, 2^{12121402525213} is an apocalyptic number.

It is an amenable number.

12121402525213 is a deficient number, since it is larger than the sum of its proper divisors (7128195).

12121402525213 is an equidigital number, since it uses as much as digits as its factorization.

12121402525213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7128194.

The product of its (nonzero) digits is 9600, while the sum is 31.

Adding to 12121402525213 its reverse (31252520412121), we get a palindrome (43373922937334).

The spelling of 12121402525213 in words is "twelve trillion, one hundred twenty-one billion, four hundred two million, five hundred twenty-five thousand, two hundred thirteen".