121540304532 has 48 divisors (see below), whose sum is σ = 288027919872. Its totient is φ = 39880869600.

The previous prime is 121540304531. The next prime is 121540304533. The reversal of 121540304532 is 235403045121.

It is an interprime number because it is at equal distance from previous prime (121540304531) and next prime (121540304533).

It is a self number, because there is not a number n which added to its sum of digits gives 121540304532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121540304531) 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, 1114513 + ... + 1218695.

It is an arithmetic number, because the mean of its divisors is an integer number (6000581664).

Almost surely, 2^121540304532 is an apocalyptic number.

121540304532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121540304532 is an abundant number, since it is smaller than the sum of its proper divisors (166487615340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121540304532 is a wasteful number, since it uses less digits than its factorization.

121540304532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105708 (or 105706 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 121540304532 its reverse (235403045121), we get a palindrome (356943349653).

The spelling of 121540304532 in words is "one hundred twenty-one billion, five hundred forty million, three hundred four thousand, five hundred thirty-two".