61233121 has 2 divisors, whose sum is σ = 61233122. Its totient is φ = 61233120.

The previous prime is 61233119. The next prime is 61233127. The reversal of 61233121 is 12133216.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60233121 + 1000000 = 7761^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 61233121 - 2¹ = 61233119 is a prime.

Together with 61233119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61233127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30616560 + 30616561.

It is an arithmetic number, because the mean of its divisors is an integer number (30616561).

Almost surely, 2^61233121 is an apocalyptic number.

It is an amenable number.

61233121 is a deficient number, since it is larger than the sum of its proper divisors (1).

61233121 is an equidigital number, since it uses as much as digits as its factorization.

61233121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 19.

The square root of 61233121 is about 7825.1594871926. The cubic root of 61233121 is about 394.1505454229.

Adding to 61233121 its reverse (12133216), we get a palindrome (73366337).

It can be divided in two parts, 612 and 33121, that added together give a palindrome (33733).

The spelling of 61233121 in words is "sixty-one million, two hundred thirty-three thousand, one hundred twenty-one".