21100131404432 has 40 divisors (see below), whose sum is σ = 42661288056384. Its totient is φ = 10090816782464.

The previous prime is 21100131404431. The next prime is 21100131404441. The reversal of 21100131404432 is 23440413100112.

It is not an unprimeable number, because it can be changed into a prime (21100131404431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5232578 + ... + 8341470.

Almost surely, 2^{21100131404432} is an apocalyptic number.

It is an amenable number.

21100131404432 is an abundant number, since it is smaller than the sum of its proper divisors (21561156651952).

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

21100131404432 is a wasteful number, since it uses less digits than its factorization.

21100131404432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3127367 (or 3127361 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 21100131404432 its reverse (23440413100112), we get a palindrome (44540544504544).

The spelling of 21100131404432 in words is "twenty-one trillion, one hundred billion, one hundred thirty-one million, four hundred four thousand, four hundred thirty-two".