12121261253 has 2 divisors, whose sum is σ = 12121261254. Its totient is φ = 12121261252.

The previous prime is 12121261247. The next prime is 12121261259. The reversal of 12121261253 is 35216212121.

It is a balanced prime because it is at equal distance from previous prime (12121261247) and next prime (12121261259).

It can be written as a sum of positive squares in only one way, i.e., 11776156324 + 345104929 = 108518^2 + 18577^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121261253 - 2²⁰ = 12120212677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121261259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060630626 + 6060630627.

It is an arithmetic number, because the mean of its divisors is an integer number (6060630627).

Almost surely, 2^12121261253 is an apocalyptic number.

It is an amenable number.

12121261253 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121261253 is an equidigital number, since it uses as much as digits as its factorization.

12121261253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 26.

Adding to 12121261253 its reverse (35216212121), we get a palindrome (47337473374).

The spelling of 12121261253 in words is "twelve billion, one hundred twenty-one million, two hundred sixty-one thousand, two hundred fifty-three".