21222220222011 has 8 divisors (see below), whose sum is σ = 28683914090320. Its totient is φ = 13954336584192.

The previous prime is 21222220221967. The next prime is 21222220222037. The reversal of 21222220222011 is 11022202222212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21222220222011 - 2³³ = 21213630287419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222220221011) 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, 48452557366 + ... + 48452557803.

It is an arithmetic number, because the mean of its divisors is an integer number (3585489261290).

Almost surely, 2^{21222220222011} is an apocalyptic number.

21222220222011 is a deficient number, since it is larger than the sum of its proper divisors (7461693868309).

21222220222011 is an equidigital number, since it uses as much as digits as its factorization.

21222220222011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96905115245.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 21222220222011 its reverse (11022202222212), we get a palindrome (32244422444223).

The spelling of 21222220222011 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-two thousand, eleven".