74121113321 has 4 divisors (see below), whose sum is σ = 76124386692. Its totient is φ = 72117839952.

The previous prime is 74121113317. The next prime is 74121113327. The reversal of 74121113321 is 12331112147.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34073098921 + 40048014400 = 184589^2 + 200120^2 .

It is a cyclic number.

It is not a de Polignac number, because 74121113321 - 2² = 74121113317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74121113327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1001636630 + ... + 1001636703.

It is an arithmetic number, because the mean of its divisors is an integer number (19031096673).

Almost surely, 2^74121113321 is an apocalyptic number.

It is an amenable number.

74121113321 is a deficient number, since it is larger than the sum of its proper divisors (2003273371).

74121113321 is a wasteful number, since it uses less digits than its factorization.

74121113321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003273370.

The product of its digits is 1008, while the sum is 26.

Adding to 74121113321 its reverse (12331112147), we get a palindrome (86452225468).

The spelling of 74121113321 in words is "seventy-four billion, one hundred twenty-one million, one hundred thirteen thousand, three hundred twenty-one".