21111021201214 has 128 divisors (see below), whose sum is σ = 39096658582272. Its totient is φ = 8343715184640.

The previous prime is 21111021201181. The next prime is 21111021201271. The reversal of 21111021201214 is 41210212011112.

It is a junction number, because it is equal to n+sod(n) for n = 21111021201191 and 21111021201200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8881370794 + ... + 8881373170.

It is an arithmetic number, because the mean of its divisors is an integer number (305442645174).

Almost surely, 2^{21111021201214} is an apocalyptic number.

21111021201214 is a deficient number, since it is larger than the sum of its proper divisors (17985637381058).

21111021201214 is a wasteful number, since it uses less digits than its factorization.

21111021201214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4550.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21111021201214 its reverse (41210212011112), we get a palindrome (62321233212326).

The spelling of 21111021201214 in words is "twenty-one trillion, one hundred eleven billion, twenty-one million, two hundred one thousand, two hundred fourteen".