121531201214515 has 8 divisors (see below), whose sum is σ = 146816216233200. Its totient is φ = 96572444454432.

The previous prime is 121531201214503. The next prime is 121531201214569. The reversal of 121531201214515 is 515412102135121.

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 121531201214515 - 2²³ = 121531192825907 is a prime.

It is a super-2 number, since 2×121531201214515² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81564563829 + ... + 81564565318.

It is an arithmetic number, because the mean of its divisors is an integer number (18352027029150).

Almost surely, 2^{121531201214515} is an apocalyptic number.

121531201214515 is a deficient number, since it is larger than the sum of its proper divisors (25285015018685).

121531201214515 is a wasteful number, since it uses less digits than its factorization.

121531201214515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163129129301.

The product of its (nonzero) digits is 12000, while the sum is 34.

Adding to 121531201214515 its reverse (515412102135121), we get a palindrome (636943303349636).

The spelling of 121531201214515 in words is "one hundred twenty-one trillion, five hundred thirty-one billion, two hundred one million, two hundred fourteen thousand, five hundred fifteen".