121532051555 has 8 divisors (see below), whose sum is σ = 147595552272. Its totient is φ = 96054247648.

The previous prime is 121532051527. The next prime is 121532051567. The reversal of 121532051555 is 555150235121.

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 121532051555 - 2⁶ = 121532051491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146423744 + ... + 146424573.

It is an arithmetic number, because the mean of its divisors is an integer number (18449444034).

Almost surely, 2^121532051555 is an apocalyptic number.

121532051555 is a deficient number, since it is larger than the sum of its proper divisors (26063500717).

121532051555 is an equidigital number, since it uses as much as digits as its factorization.

121532051555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292848405.

The product of its (nonzero) digits is 37500, while the sum is 35.

Adding to 121532051555 its reverse (555150235121), we get a palindrome (676682286676).

The spelling of 121532051555 in words is "one hundred twenty-one billion, five hundred thirty-two million, fifty-one thousand, five hundred fifty-five".