2101121201 has 4 divisors (see below), whose sum is σ = 2107965552. Its totient is φ = 2094276852.

The previous prime is 2101121177. The next prime is 2101121207. The reversal of 2101121201 is 1021211012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2101121201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101121207) 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, 3421715 + ... + 3422328.

It is an arithmetic number, because the mean of its divisors is an integer number (526991388).

Almost surely, 2^2101121201 is an apocalyptic number.

It is an amenable number.

2101121201 is a deficient number, since it is larger than the sum of its proper divisors (6844351).

2101121201 is an equidigital number, since it uses as much as digits as its factorization.

2101121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6844350.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2101121201 is about 45837.9886229752. The cubic root of 2101121201 is about 1280.8070270814.

Adding to 2101121201 its reverse (1021211012), we get a palindrome (3122332213).

The spelling of 2101121201 in words is "two billion, one hundred one million, one hundred twenty-one thousand, two hundred one".