240533234154221 has 2 divisors, whose sum is σ = 240533234154222. Its totient is φ = 240533234154220.

The previous prime is 240533234154181. The next prime is 240533234154287. The reversal of 240533234154221 is 122451432335042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237192341102500 + 3340893051721 = 15401050^2 + 1827811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240533234154221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240533284154221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120266617077110 + 120266617077111.

It is an arithmetic number, because the mean of its divisors is an integer number (120266617077111).

Almost surely, 2^{240533234154221} is an apocalyptic number.

It is an amenable number.

240533234154221 is a deficient number, since it is larger than the sum of its proper divisors (1).

240533234154221 is an equidigital number, since it uses as much as digits as its factorization.

240533234154221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 41.

Adding to 240533234154221 its reverse (122451432335042), we get a palindrome (362984666489263).

The spelling of 240533234154221 in words is "two hundred forty trillion, five hundred thirty-three billion, two hundred thirty-four million, one hundred fifty-four thousand, two hundred twenty-one".