40204124321 has 2 divisors, whose sum is σ = 40204124322. Its totient is φ = 40204124320.

The previous prime is 40204124309. The next prime is 40204124351. The reversal of 40204124321 is 12342140204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30116131600 + 10087992721 = 173540^2 + 100439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40204124321 is a prime.

It is a super-2 number, since 2×40204124321² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40204124351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102062160 + 20102062161.

It is an arithmetic number, because the mean of its divisors is an integer number (20102062161).

Almost surely, 2^40204124321 is an apocalyptic number.

It is an amenable number.

40204124321 is a deficient number, since it is larger than the sum of its proper divisors (1).

40204124321 is an equidigital number, since it uses as much as digits as its factorization.

40204124321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 40204124321 its reverse (12342140204), we get a palindrome (52546264525).

The spelling of 40204124321 in words is "forty billion, two hundred four million, one hundred twenty-four thousand, three hundred twenty-one".