21021314132 has 48 divisors (see below), whose sum is σ = 45407429760. Its totient is φ = 8292108672.

The previous prime is 21021314101. The next prime is 21021314161. The reversal of 21021314132 is 23141312012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43094 + ... + 209522.

It is an arithmetic number, because the mean of its divisors is an integer number (945988120).

Almost surely, 2^21021314132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021314132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22703714880).

21021314132 is an abundant number, since it is smaller than the sum of its proper divisors (24386115628).

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

21021314132 is a wasteful number, since it uses less digits than its factorization.

21021314132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166800 (or 166798 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21021314132 its reverse (23141312012), we get a palindrome (44162626144).

The spelling of 21021314132 in words is "twenty-one billion, twenty-one million, three hundred fourteen thousand, one hundred thirty-two".