21552072741241 has 9 divisors (see below), whose sum is σ = 25070816297541. Its totient is φ = 18473177352252.

The previous prime is 21552072741239. The next prime is 21552072741247. The reversal of 21552072741241 is 14214727025512.

The square root of 21552072741241 is 4642421.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 21552072741241 - 2¹ = 21552072741239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21552072741247) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32165346 + ... + 32828548.

Almost surely, 2^{21552072741241} is an apocalyptic number.

21552072741241 is the 4642421-st square number.

21552072741241 is the 2321211-st centered octagonal number.

It is an amenable number.

21552072741241 is a deficient number, since it is larger than the sum of its proper divisors (3518743556300).

21552072741241 is an frugal number, since it uses more digits than its factorization.

21552072741241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326420 (or 663210 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 43.

Adding to 21552072741241 its reverse (14214727025512), we get a palindrome (35766799766753).

The spelling of 21552072741241 in words is "twenty-one trillion, five hundred fifty-two billion, seventy-two million, seven hundred forty-one thousand, two hundred forty-one".