21344421410101 has 4 divisors (see below), whose sum is σ = 21346561640812. Its totient is φ = 21342281179392.

The previous prime is 21344421410087. The next prime is 21344421410119. The reversal of 21344421410101 is 10101412444312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8468711111025 + 12875710299076 = 2910105^2 + 3588274^2 .

It is a cyclic number.

It is not a de Polignac number, because 21344421410101 - 2⁵ = 21344421410069 is a prime.

It is a super-2 number, since 2×21344421410101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21344421410101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21344421410701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1070100396 + ... + 1070120341.

It is an arithmetic number, because the mean of its divisors is an integer number (5336640410203).

Almost surely, 2^{21344421410101} is an apocalyptic number.

It is an amenable number.

21344421410101 is a deficient number, since it is larger than the sum of its proper divisors (2140230711).

21344421410101 is an equidigital number, since it uses as much as digits as its factorization.

21344421410101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140230710.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 21344421410101 its reverse (10101412444312), we get a palindrome (31445833854413).

The spelling of 21344421410101 in words is "twenty-one trillion, three hundred forty-four billion, four hundred twenty-one million, four hundred ten thousand, one hundred one".