74123012221 has 2 divisors, whose sum is σ = 74123012222. Its totient is φ = 74123012220.

The previous prime is 74123012209. The next prime is 74123012233. The reversal of 74123012221 is 12221032147.

It is a balanced prime because it is at equal distance from previous prime (74123012209) and next prime (74123012233).

It can be written as a sum of positive squares in only one way, i.e., 46218980196 + 27904032025 = 214986^2 + 167045^2 .

It is an emirp because it is prime and its reverse (12221032147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74123012221 - 2²¹ = 74120915069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74123012921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37061506110 + 37061506111.

It is an arithmetic number, because the mean of its divisors is an integer number (37061506111).

Almost surely, 2^74123012221 is an apocalyptic number.

It is an amenable number.

74123012221 is a deficient number, since it is larger than the sum of its proper divisors (1).

74123012221 is an equidigital number, since it uses as much as digits as its factorization.

74123012221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 74123012221 its reverse (12221032147), we get a palindrome (86344044368).

The spelling of 74123012221 in words is "seventy-four billion, one hundred twenty-three million, twelve thousand, two hundred twenty-one".