121533005 has 12 divisors (see below), whose sum is σ = 160303836. Its totient is φ = 88387200.

The previous prime is 121533001. The next prime is 121533029. The reversal of 121533005 is 500335121.

It can be written as a sum of positive squares in 2 ways, for example, as 77827684 + 43705321 = 8822^2 + 6611^2 .

It is not a de Polignac number, because 121533005 - 2² = 121533001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121533001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99836 + ... + 101045.

It is an arithmetic number, because the mean of its divisors is an integer number (13358653).

Almost surely, 2^121533005 is an apocalyptic number.

It is an amenable number.

121533005 is a deficient number, since it is larger than the sum of its proper divisors (38770831).

121533005 is a wasteful number, since it uses less digits than its factorization.

121533005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200908 (or 200897 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 121533005 is about 11024.2008780682. The cubic root of 121533005 is about 495.3339310553. Note that the first 3 decimals are identical.

Adding to 121533005 its reverse (500335121), we get a palindrome (621868126).

The spelling of 121533005 in words is "one hundred twenty-one million, five hundred thirty-three thousand, five".