21004314212 has 12 divisors (see below), whose sum is σ = 42008628480. Its totient is φ = 9001848936.

The previous prime is 21004314203. The next prime is 21004314239. The reversal of 21004314212 is 21241340012.

21004314212 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375077012 + ... + 375077067.

It is an arithmetic number, because the mean of its divisors is an integer number (3500719040).

Almost surely, 2^21004314212 is an apocalyptic number.

It is an amenable number.

21004314212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21004314212 is a wasteful number, since it uses less digits than its factorization.

21004314212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750154090 (or 750154088 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21004314212 its reverse (21241340012), we get a palindrome (42245654224).

The spelling of 21004314212 in words is "twenty-one billion, four million, three hundred fourteen thousand, two hundred twelve".