21143033212 has 48 divisors (see below), whose sum is σ = 44811325440. Its totient is φ = 8521074432.

The previous prime is 21143033209. The next prime is 21143033243. The reversal of 21143033212 is 21233034112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 563989 + ... + 600307.

It is an arithmetic number, because the mean of its divisors is an integer number (933569280).

Almost surely, 2^21143033212 is an apocalyptic number.

It is an amenable number.

21143033212 is an abundant number, since it is smaller than the sum of its proper divisors (23668292228).

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

21143033212 is a wasteful number, since it uses less digits than its factorization.

21143033212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37570 (or 37568 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21143033212 its reverse (21233034112), we get a palindrome (42376067324).

The spelling of 21143033212 in words is "twenty-one billion, one hundred forty-three million, thirty-three thousand, two hundred twelve".