61121 has 2 divisors, whose sum is σ = 61122. Its totient is φ = 61120.

The previous prime is 61099. The next prime is 61129. The reversal of 61121 is 12116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34225 + 26896 = 185^2 + 164^2 .

It is a cyclic number.

It is not a de Polignac number, because 61121 - 2⁶ = 61057 is a prime.

It is a Chen prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (61129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30560 + 30561.

It is an arithmetic number, because the mean of its divisors is an integer number (30561).

2⁶¹¹²¹ is an apocalyptic number.

It is an amenable number.

61121 is a deficient number, since it is larger than the sum of its proper divisors (1).

61121 is an equidigital number, since it uses as much as digits as its factorization.

61121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 11.

The square root of 61121 is about 247.2266166900. The cubic root of 61121 is about 39.3909828455.

Adding to 61121 its reverse (12116), we get a palindrome (73237).

It can be divided in two parts, 61 and 121, that multiplied together give a triangular number (7381 = T₁₂₁).

The spelling of 61121 in words is "sixty-one thousand, one hundred twenty-one".