121532542455 has 32 divisors (see below), whose sum is σ = 202929338880. Its totient is φ = 61992233600.

The previous prime is 121532542447. The next prime is 121532542489. The reversal of 121532542455 is 554245235121.

It is not a de Polignac number, because 121532542455 - 2³ = 121532542447 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4627501 + ... + 4653689.

It is an arithmetic number, because the mean of its divisors is an integer number (6341541840).

Almost surely, 2^121532542455 is an apocalyptic number.

121532542455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121532542455 is a deficient number, since it is larger than the sum of its proper divisors (81396796425).

121532542455 is a wasteful number, since it uses less digits than its factorization.

121532542455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39671.

The product of its digits is 240000, while the sum is 39.

Adding to 121532542455 its reverse (554245235121), we get a palindrome (675777777576).

The spelling of 121532542455 in words is "one hundred twenty-one billion, five hundred thirty-two million, five hundred forty-two thousand, four hundred fifty-five".