21112102211 has 8 divisors (see below), whose sum is σ = 21244608000. Its totient is φ = 20979981000.

The previous prime is 21112102183. The next prime is 21112102213. The reversal of 21112102211 is 11220121112.

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 21112102211 - 2⁶ = 21112102147 is a prime.

It is a super-2 number, since 2×21112102211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112102213) 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, 14390 + ... + 205988.

It is an arithmetic number, because the mean of its divisors is an integer number (2655576000).

Almost surely, 2^21112102211 is an apocalyptic number.

21112102211 is a deficient number, since it is larger than the sum of its proper divisors (132505789).

21112102211 is a wasteful number, since it uses less digits than its factorization.

21112102211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192289.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112102211 its reverse (11220121112), we get a palindrome (32332223323).

The spelling of 21112102211 in words is "twenty-one billion, one hundred twelve million, one hundred two thousand, two hundred eleven".