21101332413 has 12 divisors (see below), whose sum is σ = 32728597440. Its totient is φ = 12057904152.

The previous prime is 21101332403. The next prime is 21101332429. The reversal of 21101332413 is 31423310112.

It is not a de Polignac number, because 21101332413 - 2⁵ = 21101332381 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21101332413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101332403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71773093 + ... + 71773386.

It is an arithmetic number, because the mean of its divisors is an integer number (2727383120).

Almost surely, 2^21101332413 is an apocalyptic number.

It is an amenable number.

21101332413 is a deficient number, since it is larger than the sum of its proper divisors (11627265027).

21101332413 is a wasteful number, since it uses less digits than its factorization.

21101332413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143546496 (or 143546489 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21101332413 its reverse (31423310112), we get a palindrome (52524642525).

The spelling of 21101332413 in words is "twenty-one billion, one hundred one million, three hundred thirty-two thousand, four hundred thirteen".