21142021302 has 64 divisors (see below), whose sum is σ = 48107727360. Its totient is φ = 6878747232.

The previous prime is 21142021267. The next prime is 21142021349. The reversal of 21142021302 is 20312024112.

It is a happy number.

21142021302 is a `hidden beast` number, since 211 + 420 + 2 + 1 + 30 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5471023 + ... + 5474885.

It is an arithmetic number, because the mean of its divisors is an integer number (751683240).

Almost surely, 2^21142021302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21142021302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24053863680).

21142021302 is an abundant number, since it is smaller than the sum of its proper divisors (26965706058).

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

21142021302 is a wasteful number, since it uses less digits than its factorization.

21142021302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6274 (or 6268 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21142021302 its reverse (20312024112), we get a palindrome (41454045414).

The spelling of 21142021302 in words is "twenty-one billion, one hundred forty-two million, twenty-one thousand, three hundred two".