2001102211201 has 4 divisors (see below), whose sum is σ = 2001121041492. Its totient is φ = 2001083380912.

The previous prime is 2001102211189. The next prime is 2001102211289. The reversal of 2001102211201 is 1021122011002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1840569768976 + 160532442225 = 1356676^2 + 400665^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001102211201 - 2⁵ = 2001102211169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001102281201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9254830 + ... + 9468583.

It is an arithmetic number, because the mean of its divisors is an integer number (500280260373).

Almost surely, 2^{2001102211201} is an apocalyptic number.

It is an amenable number.

2001102211201 is a deficient number, since it is larger than the sum of its proper divisors (18830291).

2001102211201 is a wasteful number, since it uses less digits than its factorization.

2001102211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18830290.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001102211201 its reverse (1021122011002), we get a palindrome (3022224222203).

The spelling of 2001102211201 in words is "two trillion, one billion, one hundred two million, two hundred eleven thousand, two hundred one".