21102150444240 has 40 divisors (see below), whose sum is σ = 65416666377888. Its totient is φ = 5627240118400.

The previous prime is 21102150444211. The next prime is 21102150444289. The reversal of 21102150444240 is 4244405120112.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21102150444198 and 21102150444207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43962813186 + ... + 43962813665.

Almost surely, 2^{21102150444240} is an apocalyptic number.

21102150444240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102150444240 is an abundant number, since it is smaller than the sum of its proper divisors (44314515933648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102150444240 is a wasteful number, since it uses less digits than its factorization.

21102150444240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87925626867 (or 87925626861 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 21102150444240 its reverse (4244405120112), we get a palindrome (25346555564352).

The spelling of 21102150444240 in words is "twenty-one trillion, one hundred two billion, one hundred fifty million, four hundred forty-four thousand, two hundred forty".