2102101121 has 4 divisors (see below), whose sum is σ = 2106956292. Its totient is φ = 2097245952.

The previous prime is 2102101117. The next prime is 2102101213. The reversal of 2102101121 is 1211012012.

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 712302721 + 1389798400 = 26689^2 + 37280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102101121 - 2² = 2102101117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2102101021) 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, 2426936 + ... + 2427801.

It is an arithmetic number, because the mean of its divisors is an integer number (526739073).

Almost surely, 2^2102101121 is an apocalyptic number.

It is an amenable number.

2102101121 is a deficient number, since it is larger than the sum of its proper divisors (4855171).

2102101121 is an equidigital number, since it uses as much as digits as its factorization.

2102101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4855170.

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

The square root of 2102101121 is about 45848.6763276760. The cubic root of 2102101121 is about 1281.0061102115.

Adding to 2102101121 its reverse (1211012012), we get a palindrome (3313113133).

The spelling of 2102101121 in words is "two billion, one hundred two million, one hundred one thousand, one hundred twenty-one".