21112221022211 has 8 divisors (see below), whose sum is σ = 23037408825024. Its totient is φ = 19188015716520.

The previous prime is 21112221022171. The next prime is 21112221022219. The reversal of 21112221022211 is 11222012221112.

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 21112221022211 - 2³⁰ = 21111147280387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21112221022219) 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, 245579345 + ... + 245665298.

It is an arithmetic number, because the mean of its divisors is an integer number (2879676103128).

Almost surely, 2^{21112221022211} is an apocalyptic number.

21112221022211 is a deficient number, since it is larger than the sum of its proper divisors (1925187802813).

21112221022211 is a wasteful number, since it uses less digits than its factorization.

21112221022211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491248561.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21112221022211 its reverse (11222012221112), we get a palindrome (32334233243323).

The spelling of 21112221022211 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty-one million, twenty-two thousand, two hundred eleven".