2101201220001 has 16 divisors (see below), whose sum is σ = 3017982391424. Its totient is φ = 1292672784384.

The previous prime is 2101201219981. The next prime is 2101201220033. The reversal of 2101201220001 is 1000221021012.

It is not a de Polignac number, because 2101201220001 - 2⁵ = 2101201219969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2101201220501) 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, 7657621 + ... + 7927266.

It is an arithmetic number, because the mean of its divisors is an integer number (188623899464).

Almost surely, 2^{2101201220001} is an apocalyptic number.

It is an amenable number.

2101201220001 is a deficient number, since it is larger than the sum of its proper divisors (916781171423).

2101201220001 is a wasteful number, since it uses less digits than its factorization.

2101201220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15588360.

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

Adding to 2101201220001 its reverse (1000221021012), we get a palindrome (3101422241013).

It can be divided in two parts, 2101 and 201220001, that added together give a palindrome (201222102).

The spelling of 2101201220001 in words is "two trillion, one hundred one billion, two hundred one million, two hundred twenty thousand, one".