121405324545 has 24 divisors (see below), whose sum is σ = 210529889856. Its totient is φ = 64720585248.

The previous prime is 121405324541. The next prime is 121405324549. The reversal of 121405324545 is 545423504121.

121405324545 is a `hidden beast` number, since 1 + 2 + 1 + 40 + 53 + 24 + 545 = 666.

It is an interprime number because it is at equal distance from previous prime (121405324541) and next prime (121405324549).

It is not a de Polignac number, because 121405324545 - 2² = 121405324541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121405324541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 500469 + ... + 702338.

It is an arithmetic number, because the mean of its divisors is an integer number (8772078744).

Almost surely, 2^121405324545 is an apocalyptic number.

121405324545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121405324545 is a deficient number, since it is larger than the sum of its proper divisors (89124565311).

121405324545 is a wasteful number, since it uses less digits than its factorization.

121405324545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205061 (or 1205058 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

Adding to 121405324545 its reverse (545423504121), we get a palindrome (666828828666).

The spelling of 121405324545 in words is "one hundred twenty-one billion, four hundred five million, three hundred twenty-four thousand, five hundred forty-five".