21201121102112 has 24 divisors (see below), whose sum is σ = 47702522480256. Its totient is φ = 9086194757952.

The previous prime is 21201121102103. The next prime is 21201121102169. The reversal of 21201121102112 is 21120112110212.

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, 47323930808 + ... + 47323931255.

It is an arithmetic number, because the mean of its divisors is an integer number (1987605103344).

Almost surely, 2^{21201121102112} is an apocalyptic number.

It is an amenable number.

21201121102112 is an abundant number, since it is smaller than the sum of its proper divisors (26501401378144).

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

21201121102112 is an equidigital number, since it uses as much as digits as its factorization.

21201121102112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94647862080 (or 94647862072 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21201121102112 its reverse (21120112110212), we get a palindrome (42321233212324).

The spelling of 21201121102112 in words is "twenty-one trillion, two hundred one billion, one hundred twenty-one million, one hundred two thousand, one hundred twelve".