121534556353 has 8 divisors (see below), whose sum is σ = 139210175808. Its totient is φ = 103937321904.

The previous prime is 121534556327. The next prime is 121534556369. The reversal of 121534556353 is 353655435121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121534556353 - 2²¹ = 121532459201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121534556303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19592926 + ... + 19599127.

It is an arithmetic number, because the mean of its divisors is an integer number (17401271976).

Almost surely, 2^121534556353 is an apocalyptic number.

It is an amenable number.

121534556353 is a deficient number, since it is larger than the sum of its proper divisors (17675619455).

121534556353 is an equidigital number, since it uses as much as digits as its factorization.

121534556353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39192503.

The product of its digits is 810000, while the sum is 43.

The spelling of 121534556353 in words is "one hundred twenty-one billion, five hundred thirty-four million, five hundred fifty-six thousand, three hundred fifty-three".