12121253133 has 16 divisors (see below), whose sum is σ = 17634805056. Its totient is φ = 7344592640.

The previous prime is 12121253119. The next prime is 12121253149. The reversal of 12121253133 is 33135212121.

It is a happy number.

It is not a de Polignac number, because 12121253133 - 2¹² = 12121249037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121253153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120835 + ... + 197087.

It is an arithmetic number, because the mean of its divisors is an integer number (1102175316).

Almost surely, 2^12121253133 is an apocalyptic number.

It is an amenable number.

12121253133 is a deficient number, since it is larger than the sum of its proper divisors (5513551923).

12121253133 is a wasteful number, since it uses less digits than its factorization.

12121253133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81084.

The product of its digits is 1080, while the sum is 24.

Adding to 12121253133 its reverse (33135212121), we get a palindrome (45256465254).

It can be divided in two parts, 121212 and 53133, that added together give a triangular number (174345 = T₅₉₀).

The spelling of 12121253133 in words is "twelve billion, one hundred twenty-one million, two hundred fifty-three thousand, one hundred thirty-three".