121253343415 has 16 divisors (see below), whose sum is σ = 145927177056. Its totient is φ = 96720768000.

The previous prime is 121253343403. The next prime is 121253343427. The reversal of 121253343415 is 514343352121.

It is an interprime number because it is at equal distance from previous prime (121253343403) and next prime (121253343427).

It is a de Polignac number, because none of the positive numbers 2^k-121253343415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5428420 + ... + 5450710.

It is an arithmetic number, because the mean of its divisors is an integer number (9120448566).

Almost surely, 2^121253343415 is an apocalyptic number.

121253343415 is a deficient number, since it is larger than the sum of its proper divisors (24673833641).

121253343415 is a wasteful number, since it uses less digits than its factorization.

121253343415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25410.

The product of its digits is 43200, while the sum is 34.

Adding to 121253343415 its reverse (514343352121), we get a palindrome (635596695536).

The spelling of 121253343415 in words is "one hundred twenty-one billion, two hundred fifty-three million, three hundred forty-three thousand, four hundred fifteen".