21404111222 has 32 divisors (see below), whose sum is σ = 36889310304. Its totient is φ = 9226713600.

The previous prime is 21404111221. The next prime is 21404111233. The reversal of 21404111222 is 22211140412.

It is a junction number, because it is equal to n+sod(n) for n = 21404111194 and 21404111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21404111221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126929 + ... + 242732.

It is an arithmetic number, because the mean of its divisors is an integer number (1152790947).

Almost surely, 2^21404111222 is an apocalyptic number.

21404111222 is a deficient number, since it is larger than the sum of its proper divisors (15485199082).

21404111222 is a wasteful number, since it uses less digits than its factorization.

21404111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369824.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21404111222 its reverse (22211140412), we get a palindrome (43615251634).

The spelling of 21404111222 in words is "twenty-one billion, four hundred four million, one hundred eleven thousand, two hundred twenty-two".