121532115 has 16 divisors (see below), whose sum is σ = 202906368. Its totient is φ = 61998816.

The previous prime is 121532071. The next prime is 121532119. The reversal of 121532115 is 511235121.

It is a de Polignac number, because none of the positive numbers 2^k-121532115 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121532091 and 121532100.

It is not an unprimeable number, because it can be changed into a prime (121532119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175789 + ... + 176478.

It is an arithmetic number, because the mean of its divisors is an integer number (12681648).

Almost surely, 2^121532115 is an apocalyptic number.

121532115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121532115 is a deficient number, since it is larger than the sum of its proper divisors (81374253).

121532115 is a wasteful number, since it uses less digits than its factorization.

121532115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352298.

The product of its digits is 300, while the sum is 21.

The square root of 121532115 is about 11024.1605122567. The cubic root of 121532115 is about 495.3327219235.

Adding to 121532115 its reverse (511235121), we get a palindrome (632767236).

The spelling of 121532115 in words is "one hundred twenty-one million, five hundred thirty-two thousand, one hundred fifteen".