21113201021212 has 6 divisors (see below), whose sum is σ = 36948101787128. Its totient is φ = 10556600510604.

The previous prime is 21113201021189. The next prime is 21113201021249. The reversal of 21113201021212 is 21212010231112.

It is a self number, because there is not a number n which added to its sum of digits gives 21113201021212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2639150127648 + ... + 2639150127655.

Almost surely, 2^{21113201021212} is an apocalyptic number.

It is an amenable number.

21113201021212 is a deficient number, since it is larger than the sum of its proper divisors (15834900765916).

21113201021212 is a wasteful number, since it uses less digits than its factorization.

21113201021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278300255307 (or 5278300255305 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21113201021212 its reverse (21212010231112), we get a palindrome (42325211252324).

The spelling of 21113201021212 in words is "twenty-one trillion, one hundred thirteen billion, two hundred one million, twenty-one thousand, two hundred twelve".