121510351425 has 24 divisors (see below), whose sum is σ = 201030258240. Its totient is φ = 64762571200.

The previous prime is 121510351399. The next prime is 121510351507. The reversal of 121510351425 is 524153015121.

It is not a de Polignac number, because 121510351425 - 2⁷ = 121510351297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121510351392 and 121510351401.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 422790 + ... + 649439.

It is an arithmetic number, because the mean of its divisors is an integer number (8376260760).

Almost surely, 2^121510351425 is an apocalyptic number.

121510351425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121510351425 is a deficient number, since it is larger than the sum of its proper divisors (79519906815).

121510351425 is a wasteful number, since it uses less digits than its factorization.

121510351425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073753 (or 1073748 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 121510351425 its reverse (524153015121), we get a palindrome (645663366546).

The spelling of 121510351425 in words is "one hundred twenty-one billion, five hundred ten million, three hundred fifty-one thousand, four hundred twenty-five".