40221234281 has 2 divisors, whose sum is σ = 40221234282. Its totient is φ = 40221234280.

The previous prime is 40221234257. The next prime is 40221234299. The reversal of 40221234281 is 18243212204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38292619225 + 1928615056 = 195685^2 + 43916^2 .

It is a cyclic number.

It is not a de Polignac number, because 40221234281 - 2¹⁰ = 40221233257 is a prime.

It is a super-2 number, since 2×40221234281² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40221234481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110617140 + 20110617141.

It is an arithmetic number, because the mean of its divisors is an integer number (20110617141).

Almost surely, 2^40221234281 is an apocalyptic number.

It is an amenable number.

40221234281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221234281 is an equidigital number, since it uses as much as digits as its factorization.

40221234281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 40221234281 its reverse (18243212204), we get a palindrome (58464446485).

The spelling of 40221234281 in words is "forty billion, two hundred twenty-one million, two hundred thirty-four thousand, two hundred eighty-one".