21202220222211 has 16 divisors (see below), whose sum is σ = 32750722433024. Its totient is φ = 11949587913024.

The previous prime is 21202220222167. The next prime is 21202220222243. The reversal of 21202220222211 is 11222202220212.

It is not a de Polignac number, because 21202220222211 - 2¹⁴ = 21202220205827 is a prime.

It is a super-3 number, since 3×21202220222211³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202220222411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6915269251 + ... + 6915272316.

It is an arithmetic number, because the mean of its divisors is an integer number (2046920152064).

Almost surely, 2^{21202220222211} is an apocalyptic number.

21202220222211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21202220222211 is a deficient number, since it is larger than the sum of its proper divisors (11548502210813).

21202220222211 is a wasteful number, since it uses less digits than its factorization.

21202220222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13830541650.

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

Adding to 21202220222211 its reverse (11222202220212), we get a palindrome (32424422442423).

The spelling of 21202220222211 in words is "twenty-one trillion, two hundred two billion, two hundred twenty million, two hundred twenty-two thousand, two hundred eleven".