121533001 has 2 divisors, whose sum is σ = 121533002. Its totient is φ = 121533000.

The previous prime is 121532953. The next prime is 121533029. The reversal of 121533001 is 100335121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66846976 + 54686025 = 8176^2 + 7395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121533001 is a prime.

It is not a weakly prime, because it can be changed into another prime (121533091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60766500 + 60766501.

It is an arithmetic number, because the mean of its divisors is an integer number (60766501).

Almost surely, 2^121533001 is an apocalyptic number.

It is an amenable number.

121533001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121533001 is an equidigital number, since it uses as much as digits as its factorization.

121533001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 121533001 is about 11024.2006966492. The cubic root of 121533001 is about 495.3339256210. Note that the first 3 decimals are identical.

Adding to 121533001 its reverse (100335121), we get a palindrome (221868122).

The spelling of 121533001 in words is "one hundred twenty-one million, five hundred thirty-three thousand, one".