21112221012011 has 8 divisors (see below), whose sum is σ = 21234381543264. Its totient is φ = 20990061912960.

The previous prime is 21112221012007. The next prime is 21112221012017. The reversal of 21112221012011 is 11021012221112.

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 21112221012011 - 2² = 21112221012007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112221012017) 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, 48195491 + ... + 48631571.

It is an arithmetic number, because the mean of its divisors is an integer number (2654297692908).

Almost surely, 2^{21112221012011} is an apocalyptic number.

21112221012011 is a deficient number, since it is larger than the sum of its proper divisors (122160531253).

21112221012011 is a wasteful number, since it uses less digits than its factorization.

21112221012011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716101.

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

Adding to 21112221012011 its reverse (11021012221112), we get a palindrome (32133233233123).

The spelling of 21112221012011 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, twelve thousand, eleven".