2100220121201 has 2 divisors, whose sum is σ = 2100220121202. Its totient is φ = 2100220121200.

The previous prime is 2100220121189. The next prime is 2100220121249. The reversal of 2100220121201 is 1021210220012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1395835917025 + 704384204176 = 1181455^2 + 839276^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100220121201 - 2¹⁰ = 2100220120177 is a prime.

It is not a weakly prime, because it can be changed into another prime (2100225121201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050110060600 + 1050110060601.

It is an arithmetic number, because the mean of its divisors is an integer number (1050110060601).

Almost surely, 2^{2100220121201} is an apocalyptic number.

It is an amenable number.

2100220121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100220121201 is an equidigital number, since it uses as much as digits as its factorization.

2100220121201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2100220121201 its reverse (1021210220012), we get a palindrome (3121430341213).

The spelling of 2100220121201 in words is "two trillion, one hundred billion, two hundred twenty million, one hundred twenty-one thousand, two hundred one".