21111011202011 has 8 divisors (see below), whose sum is σ = 21426407362560. Its totient is φ = 20795624054568.

The previous prime is 21111011201989. The next prime is 21111011202023. The reversal of 21111011202011 is 11020211011112.

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 21111011202011 - 2⁴² = 16712964690907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21111011102011) 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, 2541890 + ... + 6977336.

It is an arithmetic number, because the mean of its divisors is an integer number (2678300920320).

Almost surely, 2^{21111011202011} is an apocalyptic number.

21111011202011 is a deficient number, since it is larger than the sum of its proper divisors (315396160549).

21111011202011 is an equidigital number, since it uses as much as digits as its factorization.

21111011202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506553.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21111011202011 its reverse (11020211011112), we get a palindrome (32131222213123).

The spelling of 21111011202011 in words is "twenty-one trillion, one hundred eleven billion, eleven million, two hundred two thousand, eleven".