121542241535 has 32 divisors (see below), whose sum is σ = 172765293120. Its totient is φ = 81594733440.

The previous prime is 121542241519. The next prime is 121542241553. The reversal of 121542241535 is 535142245121.

It is not a de Polignac number, because 121542241535 - 2⁴ = 121542241519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121542241495 and 121542241504.

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, 615920 + ... + 788949.

It is an arithmetic number, because the mean of its divisors is an integer number (5398915410).

Almost surely, 2^121542241535 is an apocalyptic number.

121542241535 is a deficient number, since it is larger than the sum of its proper divisors (51223051585).

121542241535 is a wasteful number, since it uses less digits than its factorization.

121542241535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404920 (or 1404898 counting only the distinct ones).

The product of its digits is 48000, while the sum is 35.

Adding to 121542241535 its reverse (535142245121), we get a palindrome (656684486656).

The spelling of 121542241535 in words is "one hundred twenty-one billion, five hundred forty-two million, two hundred forty-one thousand, five hundred thirty-five".