21011101222 has 8 divisors (see below), whose sum is σ = 31822639056. Its totient is φ = 10403554872.

The previous prime is 21011101217. The next prime is 21011101231. The reversal of 21011101222 is 22210111012.

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

It is a super-2 number, since 2×21011101222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50997613 + ... + 50998024.

It is an arithmetic number, because the mean of its divisors is an integer number (3977829882).

Almost surely, 2^21011101222 is an apocalyptic number.

21011101222 is a deficient number, since it is larger than the sum of its proper divisors (10811537834).

21011101222 is a wasteful number, since it uses less digits than its factorization.

21011101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101995742.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21011101222 its reverse (22210111012), we get a palindrome (43221212234).

It can be divided in two parts, 210111012 and 22, that multiplied together give a palindrome (4622442264).

The spelling of 21011101222 in words is "twenty-one billion, eleven million, one hundred one thousand, two hundred twenty-two".