21211122202112 has 40 divisors (see below), whose sum is σ = 42800428579392. Its totient is φ = 10500555520000.

The previous prime is 21211122202037. The next prime is 21211122202133. The reversal of 21211122202112 is 21120222111212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205037264 + ... + 205140687.

Almost surely, 2^{21211122202112} is an apocalyptic number.

It is an amenable number.

21211122202112 is an abundant number, since it is smaller than the sum of its proper divisors (21589306377280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21211122202112 is an equidigital number, since it uses as much as digits as its factorization.

21211122202112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410178070 (or 410178054 counting only the distinct ones).

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

Adding to 21211122202112 its reverse (21120222111212), we get a palindrome (42331344313324).

The spelling of 21211122202112 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred two thousand, one hundred twelve".