21222002012111 has 8 divisors (see below), whose sum is σ = 22166429569920. Its totient is φ = 20279385439192.

The previous prime is 21222002012089. The next prime is 21222002012119. The reversal of 21222002012111 is 11121020022212.

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

It is a cyclic number.

It is not a de Polignac number, because 21222002012111 - 2²² = 21221997817807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222002012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222002012119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452722265 + ... + 452769138.

It is an arithmetic number, because the mean of its divisors is an integer number (2770803696240).

Almost surely, 2^{21222002012111} is an apocalyptic number.

21222002012111 is a deficient number, since it is larger than the sum of its proper divisors (944427557809).

21222002012111 is a wasteful number, since it uses less digits than its factorization.

21222002012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905492445.

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

Adding to 21222002012111 its reverse (11121020022212), we get a palindrome (32343022034323).

The spelling of 21222002012111 in words is "twenty-one trillion, two hundred twenty-two billion, two million, twelve thousand, one hundred eleven".