21211212114 has 24 divisors (see below), whose sum is σ = 46474007580. Its totient is φ = 6990960768.

The previous prime is 21211212109. The next prime is 21211212133. The reversal of 21211212114 is 41121211212.

It can be written as a sum of positive squares in 2 ways, for example, as 16555196889 + 4656015225 = 128667^2 + 68235^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6618627 + ... + 6621830.

Almost surely, 2^21211212114 is an apocalyptic number.

21211212114 is an abundant number, since it is smaller than the sum of its proper divisors (25262795466).

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

21211212114 is a wasteful number, since it uses less digits than its factorization.

21211212114 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13240554 (or 13240551 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 21211212114 its reverse (41121211212), we get a palindrome (62332423326).

The spelling of 21211212114 in words is "twenty-one billion, two hundred eleven million, two hundred twelve thousand, one hundred fourteen".