12121451153252 has 18 divisors (see below), whose sum is σ = 24675811276662. Its totient is φ = 5194907637024.

The previous prime is 12121451153173. The next prime is 12121451153311. The reversal of 12121451153252 is 25235115412121.

It can be written as a sum of positive squares in only one way, i.e., 9474244056676 + 2647207096576 = 3078026^2 + 1627024^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30922069073 + ... + 30922069464.

It is an arithmetic number, because the mean of its divisors is an integer number (1370878404259).

Almost surely, 2^{12121451153252} is an apocalyptic number.

It is an amenable number.

12121451153252 is an abundant number, since it is smaller than the sum of its proper divisors (12554360123410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121451153252 is a wasteful number, since it uses less digits than its factorization.

12121451153252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61844138555 (or 61844138546 counting only the distinct ones).

The product of its digits is 24000, while the sum is 35.

Adding to 12121451153252 its reverse (25235115412121), we get a palindrome (37356566565373).

The spelling of 12121451153252 in words is "twelve trillion, one hundred twenty-one billion, four hundred fifty-one million, one hundred fifty-three thousand, two hundred fifty-two".