21665241100022 has 32 divisors (see below), whose sum is σ = 36219526237440. Its totient is φ = 9651906437760.

The previous prime is 21665241099949. The next prime is 21665241100079. The reversal of 21665241100022 is 22000114256612.

It is a super-3 number, since 3×21665241100022³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34236533 + ... + 34863600.

It is an arithmetic number, because the mean of its divisors is an integer number (1131860194920).

Almost surely, 2^{21665241100022} is an apocalyptic number.

21665241100022 is a deficient number, since it is larger than the sum of its proper divisors (14554285137418).

21665241100022 is a wasteful number, since it uses less digits than its factorization.

21665241100022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69100568.

The product of its (nonzero) digits is 11520, while the sum is 32.

Adding to 21665241100022 its reverse (22000114256612), we get a palindrome (43665355356634).

The spelling of 21665241100022 in words is "twenty-one trillion, six hundred sixty-five billion, two hundred forty-one million, one hundred thousand, twenty-two".