121512351121 has 8 divisors (see below), whose sum is σ = 142258362624. Its totient is φ = 101613115680.

The previous prime is 121512351113. The next prime is 121512351139. The reversal of 121512351121 is 121153215121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121512351121 - 2³ = 121512351113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121512351101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211693705 + ... + 211694278.

It is an arithmetic number, because the mean of its divisors is an integer number (17782295328).

Almost surely, 2^121512351121 is an apocalyptic number.

It is an amenable number.

121512351121 is a deficient number, since it is larger than the sum of its proper divisors (20746011503).

121512351121 is an equidigital number, since it uses as much as digits as its factorization.

121512351121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423388031.

The product of its digits is 600, while the sum is 25.

Adding to 121512351121 its reverse (121153215121), we get a palindrome (242665566242).

The spelling of 121512351121 in words is "one hundred twenty-one billion, five hundred twelve million, three hundred fifty-one thousand, one hundred twenty-one".