21011222000111 has 8 divisors (see below), whose sum is σ = 24598503805344. Its totient is φ = 17570359860480.

The previous prime is 21011222000099. The next prime is 21011222000137. The reversal of 21011222000111 is 11100022211012.

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

It is not a de Polignac number, because 21011222000111 - 2⁶ = 21011222000047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011222000161) 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, 36604916090 + ... + 36604916663.

It is an arithmetic number, because the mean of its divisors is an integer number (3074812975668).

Almost surely, 2^{21011222000111} is an apocalyptic number.

21011222000111 is a deficient number, since it is larger than the sum of its proper divisors (3587281805233).

21011222000111 is an equidigital number, since it uses as much as digits as its factorization.

21011222000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73209832801.

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

Adding to 21011222000111 its reverse (11100022211012), we get a palindrome (32111244211123).

The spelling of 21011222000111 in words is "twenty-one trillion, eleven billion, two hundred twenty-two million, one hundred eleven", and thus it is an aban number.