21112211012011 has 8 divisors (see below), whose sum is σ = 24177785803520. Its totient is φ = 18059022382248.

The previous prime is 21112211011973. The next prime is 21112211012063. The reversal of 21112211012011 is 11021011221112.

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 21112211012011 - 2⁷ = 21112211011883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112011012011) 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, 3096536781 + ... + 3096543598.

It is an arithmetic number, because the mean of its divisors is an integer number (3022223225440).

Almost surely, 2^{21112211012011} is an apocalyptic number.

21112211012011 is a deficient number, since it is larger than the sum of its proper divisors (3065574791509).

21112211012011 is an equidigital number, since it uses as much as digits as its factorization.

21112211012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193080873.

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

Adding to 21112211012011 its reverse (11021011221112), we get a palindrome (32133222233123).

The spelling of 21112211012011 in words is "twenty-one trillion, one hundred twelve billion, two hundred eleven million, twelve thousand, eleven".