21202111214 has 8 divisors (see below), whose sum is σ = 31893261840. Its totient is φ = 10571023936.

The previous prime is 21202111171. The next prime is 21202111253. The reversal of 21202111214 is 41211120212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21202111192 and 21202111201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15014954 + ... + 15016365.

It is an arithmetic number, because the mean of its divisors is an integer number (3986657730).

Almost surely, 2^21202111214 is an apocalyptic number.

21202111214 is a deficient number, since it is larger than the sum of its proper divisors (10691150626).

21202111214 is a wasteful number, since it uses less digits than its factorization.

21202111214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30031674.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21202111214 its reverse (41211120212), we get a palindrome (62413231426).

The spelling of 21202111214 in words is "twenty-one billion, two hundred two million, one hundred eleven thousand, two hundred fourteen".