21100011222211 has 8 divisors (see below), whose sum is σ = 21498224994720. Its totient is φ = 20701801166592.

The previous prime is 21100011222203. The next prime is 21100011222263. The reversal of 21100011222211 is 11222211000112.

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 21100011222211 - 2³ = 21100011222203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100011222011) 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, 12289210 + ... + 13900528.

It is an arithmetic number, because the mean of its divisors is an integer number (2687278124340).

Almost surely, 2^{21100011222211} is an apocalyptic number.

21100011222211 is a deficient number, since it is larger than the sum of its proper divisors (398213772509).

21100011222211 is a wasteful number, since it uses less digits than its factorization.

21100011222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858445.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21100011222211 its reverse (11222211000112), we get a palindrome (32322222222323).

The spelling of 21100011222211 in words is "twenty-one trillion, one hundred billion, eleven million, two hundred twenty-two thousand, two hundred eleven".