21444102022331 has 4 divisors (see below), whose sum is σ = 21644514190872. Its totient is φ = 21243689853792.

The previous prime is 21444102022243. The next prime is 21444102022367. The reversal of 21444102022331 is 13322020144412.

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

It is a cyclic number.

It is not a de Polignac number, because 21444102022331 - 2¹⁸ = 21444101760187 is a prime.

It is a super-2 number, since 2×21444102022331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21444102022294 and 21444102022303.

It is not an unprimeable number, because it can be changed into a prime (21444102022631) 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, 100206084110 + ... + 100206084323.

It is an arithmetic number, because the mean of its divisors is an integer number (5411128547718).

Almost surely, 2^{21444102022331} is an apocalyptic number.

21444102022331 is a deficient number, since it is larger than the sum of its proper divisors (200412168541).

21444102022331 is a wasteful number, since it uses less digits than its factorization.

21444102022331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200412168540.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21444102022331 its reverse (13322020144412), we get a palindrome (34766122166743).

The spelling of 21444102022331 in words is "twenty-one trillion, four hundred forty-four billion, one hundred two million, twenty-two thousand, three hundred thirty-one".