21101311222 has 32 divisors (see below), whose sum is σ = 33234001920. Its totient is φ = 10029196320.

The previous prime is 21101311201. The next prime is 21101311241. The reversal of 21101311222 is 22211310112.

It is a junction number, because it is equal to n+sod(n) for n = 21101311196 and 21101311205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7374072 + ... + 7376932.

It is an arithmetic number, because the mean of its divisors is an integer number (1038562560).

Almost surely, 2^21101311222 is an apocalyptic number.

21101311222 is a deficient number, since it is larger than the sum of its proper divisors (12132690698).

21101311222 is a wasteful number, since it uses less digits than its factorization.

21101311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21101311222 its reverse (22211310112), we get a palindrome (43312621334).

The spelling of 21101311222 in words is "twenty-one billion, one hundred one million, three hundred eleven thousand, two hundred twenty-two".