184121810154721 has 2 divisors, whose sum is σ = 184121810154722. Its totient is φ = 184121810154720.

The previous prime is 184121810154673. The next prime is 184121810154743. The reversal of 184121810154721 is 127451018121481.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183935845667025 + 185964487696 = 13562295^2 + 431236^2 .

It is an emirp because it is prime and its reverse (127451018121481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 184121810154721 - 2⁷ = 184121810154593 is a prime.

It is a super-2 number, since 2×184121810154721² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (184121810154781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92060905077360 + 92060905077361.

It is an arithmetic number, because the mean of its divisors is an integer number (92060905077361).

Almost surely, 2^{184121810154721} is an apocalyptic number.

It is an amenable number.

184121810154721 is a deficient number, since it is larger than the sum of its proper divisors (1).

184121810154721 is an equidigital number, since it uses as much as digits as its factorization.

184121810154721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 143360, while the sum is 46.

The spelling of 184121810154721 in words is "one hundred eighty-four trillion, one hundred twenty-one billion, eight hundred ten million, one hundred fifty-four thousand, seven hundred twenty-one".