74561061121 has 2 divisors, whose sum is σ = 74561061122. Its totient is φ = 74561061120.

The previous prime is 74561061109. The next prime is 74561061137. The reversal of 74561061121 is 12116016547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73638420496 + 922640625 = 271364^2 + 30375^2 .

It is an emirp because it is prime and its reverse (12116016547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74561061121 - 2³¹ = 72413577473 is a prime.

It is not a weakly prime, because it can be changed into another prime (74561061221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37280530560 + 37280530561.

It is an arithmetic number, because the mean of its divisors is an integer number (37280530561).

Almost surely, 2^74561061121 is an apocalyptic number.

It is an amenable number.

74561061121 is a deficient number, since it is larger than the sum of its proper divisors (1).

74561061121 is an equidigital number, since it uses as much as digits as its factorization.

74561061121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

Adding to 74561061121 its reverse (12116016547), we get a palindrome (86677077668).

The spelling of 74561061121 in words is "seventy-four billion, five hundred sixty-one million, sixty-one thousand, one hundred twenty-one".