21102201212001 has 48 divisors (see below), whose sum is σ = 34820764867584. Its totient is φ = 11130434707392.

The previous prime is 21102201211963. The next prime is 21102201212003. The reversal of 21102201212001 is 10021210220112.

It is not a de Polignac number, because 21102201212001 - 2⁷ = 21102201211873 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21102201212003) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 118046250 + ... + 118224876.

It is an arithmetic number, because the mean of its divisors is an integer number (725432601408).

Almost surely, 2^{21102201212001} is an apocalyptic number.

21102201212001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21102201212001 is a deficient number, since it is larger than the sum of its proper divisors (13718563655583).

21102201212001 is a wasteful number, since it uses less digits than its factorization.

21102201212001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211950 (or 211937 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21102201212001 its reverse (10021210220112), we get a palindrome (31123411432113).

The spelling of 21102201212001 in words is "twenty-one trillion, one hundred two billion, two hundred one million, two hundred twelve thousand, one".