2100221001121 has 2 divisors, whose sum is σ = 2100221001122. Its totient is φ = 2100221001120.

The previous prime is 2100221001071. The next prime is 2100221001181. The reversal of 2100221001121 is 1211001220012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1895677370896 + 204543630225 = 1376836^2 + 452265^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100221001121 - 2²³ = 2100212612513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100221001181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050110500560 + 1050110500561.

It is an arithmetic number, because the mean of its divisors is an integer number (1050110500561).

Almost surely, 2^{2100221001121} is an apocalyptic number.

It is an amenable number.

2100221001121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100221001121 is an equidigital number, since it uses as much as digits as its factorization.

2100221001121 is an evil number, because the sum of its binary digits is even.

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

Adding to 2100221001121 its reverse (1211001220012), we get a palindrome (3311222221133).

The spelling of 2100221001121 in words is "two trillion, one hundred billion, two hundred twenty-one million, one thousand, one hundred twenty-one".