61332121 has 2 divisors, whose sum is σ = 61332122. Its totient is φ = 61332120.

The previous prime is 61332109. The next prime is 61332127. The reversal of 61332121 is 12123316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59892121 + 1440000 = 7739^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 61332121 - 2¹⁵ = 61299353 is a prime.

It is not a weakly prime, because it can be changed into another prime (61332127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30666060 + 30666061.

It is an arithmetic number, because the mean of its divisors is an integer number (30666061).

Almost surely, 2^61332121 is an apocalyptic number.

It is an amenable number.

61332121 is a deficient number, since it is larger than the sum of its proper divisors (1).

61332121 is an equidigital number, since it uses as much as digits as its factorization.

61332121 is an evil number, because the sum of its binary digits is even.

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

The square root of 61332121 is about 7831.4826820979. The cubic root of 61332121 is about 394.3628482471.

Adding to 61332121 its reverse (12123316), we get a palindrome (73455437).

The spelling of 61332121 in words is "sixty-one million, three hundred thirty-two thousand, one hundred twenty-one".