121333261 has 6 divisors (see below), whose sum is σ = 141142830. Its totient is φ = 103999896.

The previous prime is 121333253. The next prime is 121333313. The reversal of 121333261 is 162333121.

It can be written as a sum of positive squares in only one way, i.e., 90364036 + 30969225 = 9506^2 + 5565^2 .

It is not a de Polignac number, because 121333261 - 2³ = 121333253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121333231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1238046 + ... + 1238143.

It is an arithmetic number, because the mean of its divisors is an integer number (23523805).

Almost surely, 2^121333261 is an apocalyptic number.

It is an amenable number.

121333261 is a deficient number, since it is larger than the sum of its proper divisors (19809569).

121333261 is an equidigital number, since it uses as much as digits as its factorization.

121333261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476203 (or 2476196 counting only the distinct ones).

The product of its digits is 648, while the sum is 22.

The square root of 121333261 is about 11015.1378112123. The cubic root of 121333261 is about 495.0624156918.

Adding to 121333261 its reverse (162333121), we get a palindrome (283666382).

The spelling of 121333261 in words is "one hundred twenty-one million, three hundred thirty-three thousand, two hundred sixty-one".