21112202112011 has 32 divisors (see below), whose sum is σ = 23687089459200. Its totient is φ = 18713512097280.

The previous prime is 21112202111993. The next prime is 21112202112041. The reversal of 21112202112011 is 11021120221112.

It is a cyclic number.

It is not a de Polignac number, because 21112202112011 - 2¹⁴ = 21112202095627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112202112041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10137221 + ... + 12041081.

It is an arithmetic number, because the mean of its divisors is an integer number (740221545600).

Almost surely, 2^{21112202112011} is an apocalyptic number.

21112202112011 is a deficient number, since it is larger than the sum of its proper divisors (2574887347189).

21112202112011 is a wasteful number, since it uses less digits than its factorization.

21112202112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904339.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21112202112011 its reverse (11021120221112), we get a palindrome (32133322333123).

The spelling of 21112202112011 in words is "twenty-one trillion, one hundred twelve billion, two hundred two million, one hundred twelve thousand, eleven".