21441031252477 has 2 divisors, whose sum is σ = 21441031252478. Its totient is φ = 21441031252476.

The previous prime is 21441031252367. The next prime is 21441031252549. The reversal of 21441031252477 is 77425213014412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21387720598596 + 53310653881 = 4624686^2 + 230891^2 .

It is a cyclic number.

It is not a de Polignac number, because 21441031252477 - 2²⁷ = 21440897034749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21441031258477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10720515626238 + 10720515626239.

It is an arithmetic number, because the mean of its divisors is an integer number (10720515626239).

Almost surely, 2^{21441031252477} is an apocalyptic number.

It is an amenable number.

21441031252477 is a deficient number, since it is larger than the sum of its proper divisors (1).

21441031252477 is an equidigital number, since it uses as much as digits as its factorization.

21441031252477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 43.

Adding to 21441031252477 its reverse (77425213014412), we get a palindrome (98866244266889).

The spelling of 21441031252477 in words is "twenty-one trillion, four hundred forty-one billion, thirty-one million, two hundred fifty-two thousand, four hundred seventy-seven".