21302213212 has 48 divisors (see below), whose sum is σ = 43624369152. Its totient is φ = 8913461760.

The previous prime is 21302213197. The next prime is 21302213243. The reversal of 21302213212 is 21231220312.

It is a self number, because there is not a number n which added to its sum of digits gives 21302213212.

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, 152748 + ... + 256780.

It is an arithmetic number, because the mean of its divisors is an integer number (908841024).

Almost surely, 2^21302213212 is an apocalyptic number.

It is an amenable number.

21302213212 is an abundant number, since it is smaller than the sum of its proper divisors (22322155940).

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

21302213212 is a wasteful number, since it uses less digits than its factorization.

21302213212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104218 (or 104216 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21302213212 its reverse (21231220312), we get a palindrome (42533433524).

The spelling of 21302213212 in words is "twenty-one billion, three hundred two million, two hundred thirteen thousand, two hundred twelve".