21242464122463 has 2 divisors, whose sum is σ = 21242464122464. Its totient is φ = 21242464122462.

The previous prime is 21242464122437. The next prime is 21242464122493. The reversal of 21242464122463 is 36422146424212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21242464122463 - 2²⁹ = 21241927251551 is a prime.

It is a super-2 number, since 2×21242464122463² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21242464122413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10621232061231 + 10621232061232.

It is an arithmetic number, because the mean of its divisors is an integer number (10621232061232).

Almost surely, 2^{21242464122463} is an apocalyptic number.

21242464122463 is a deficient number, since it is larger than the sum of its proper divisors (1).

21242464122463 is an equidigital number, since it uses as much as digits as its factorization.

21242464122463 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 43.

The spelling of 21242464122463 in words is "twenty-one trillion, two hundred forty-two billion, four hundred sixty-four million, one hundred twenty-two thousand, four hundred sixty-three".