121223500535 has 16 divisors (see below), whose sum is σ = 145872392736. Its totient is φ = 96709552128.

The previous prime is 121223500513. The next prime is 121223500547. The reversal of 121223500535 is 535005322121.

It is a cyclic number.

It is not a de Polignac number, because 121223500535 - 2³⁶ = 52504023799 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121223500498 and 121223500507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5069327 + ... + 5093183.

It is an arithmetic number, because the mean of its divisors is an integer number (9117024546).

Almost surely, 2^121223500535 is an apocalyptic number.

121223500535 is a deficient number, since it is larger than the sum of its proper divisors (24648892201).

121223500535 is a wasteful number, since it uses less digits than its factorization.

121223500535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26642.

The product of its (nonzero) digits is 9000, while the sum is 29.

Adding to 121223500535 its reverse (535005322121), we get a palindrome (656228822656).

The spelling of 121223500535 in words is "one hundred twenty-one billion, two hundred twenty-three million, five hundred thousand, five hundred thirty-five".