2100120221001 has 32 divisors (see below), whose sum is σ = 3137602796928. Its totient is φ = 1238272842240.

The previous prime is 2100120220981. The next prime is 2100120221041. The reversal of 2100120221001 is 1001220210012.

It is not a de Polignac number, because 2100120221001 - 2⁹ = 2100120220489 is a prime.

It is a super-3 number, since 3×2100120221001³ (a number of 38 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2100120221041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12533365 + ... + 12699821.

It is an arithmetic number, because the mean of its divisors is an integer number (98050087404).

Almost surely, 2^{2100120221001} is an apocalyptic number.

It is an amenable number.

2100120221001 is a deficient number, since it is larger than the sum of its proper divisors (1037482575927).

2100120221001 is a wasteful number, since it uses less digits than its factorization.

2100120221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176841.

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

Adding to 2100120221001 its reverse (1001220210012), we get a palindrome (3101340431013).

The spelling of 2100120221001 in words is "two trillion, one hundred billion, one hundred twenty million, two hundred twenty-one thousand, one".