61043452121 has 2 divisors, whose sum is σ = 61043452122. Its totient is φ = 61043452120.

The previous prime is 61043452061. The next prime is 61043452153. The reversal of 61043452121 is 12125434016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60289400521 + 754051600 = 245539^2 + 27460^2 .

It is a cyclic number.

It is not a de Polignac number, because 61043452121 - 2¹⁴ = 61043435737 is a prime.

It is not a weakly prime, because it can be changed into another prime (61043458121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30521726060 + 30521726061.

It is an arithmetic number, because the mean of its divisors is an integer number (30521726061).

Almost surely, 2^61043452121 is an apocalyptic number.

It is an amenable number.

61043452121 is a deficient number, since it is larger than the sum of its proper divisors (1).

61043452121 is an equidigital number, since it uses as much as digits as its factorization.

61043452121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 61043452121 its reverse (12125434016), we get a palindrome (73168886137).

The spelling of 61043452121 in words is "sixty-one billion, forty-three million, four hundred fifty-two thousand, one hundred twenty-one".