201220001210001 has 12 divisors (see below), whose sum is σ = 274996678241936. Its totient is φ = 130874797531680.

The previous prime is 201220001209973. The next prime is 201220001210087. The reversal of 201220001210001 is 100012100022102.

It is not a de Polignac number, because 201220001210001 - 2¹⁰ = 201220001208977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201220001210401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19950421411 + ... + 19950431496.

Almost surely, 2^{201220001210001} is an apocalyptic number.

It is an amenable number.

201220001210001 is a deficient number, since it is larger than the sum of its proper divisors (73776677031935).

201220001210001 is an equidigital number, since it uses as much as digits as its factorization.

201220001210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39900852992 (or 39900852951 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 201220001210001 its reverse (100012100022102), we get a palindrome (301232101232103).

The spelling of 201220001210001 in words is "two hundred one trillion, two hundred twenty billion, one million, two hundred ten thousand, one".