21120440132069 has 2 divisors, whose sum is σ = 21120440132070. Its totient is φ = 21120440132068.

The previous prime is 21120440132021. The next prime is 21120440132087. The reversal of 21120440132069 is 96023104402112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15882576237025 + 5237863895044 = 3985295^2 + 2288638^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120440132069 - 2¹² = 21120440127973 is a prime.

It is a super-2 number, since 2×21120440132069² (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 (21120440132269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560220066034 + 10560220066035.

It is an arithmetic number, because the mean of its divisors is an integer number (10560220066035).

Almost surely, 2^{21120440132069} is an apocalyptic number.

It is an amenable number.

21120440132069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120440132069 is an equidigital number, since it uses as much as digits as its factorization.

21120440132069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 21120440132069 in words is "twenty-one trillion, one hundred twenty billion, four hundred forty million, one hundred thirty-two thousand, sixty-nine".