2100202211021 has 2 divisors, whose sum is σ = 2100202211022. Its totient is φ = 2100202211020.

The previous prime is 2100202210957. The next prime is 2100202211039. The reversal of 2100202211021 is 1201122020012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198346196100 + 901856014921 = 1094690^2 + 949661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100202211021 - 2⁶ = 2100202210957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100202210987 and 2100202211005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100202211221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050101105510 + 1050101105511.

It is an arithmetic number, because the mean of its divisors is an integer number (1050101105511).

Almost surely, 2^{2100202211021} is an apocalyptic number.

It is an amenable number.

2100202211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100202211021 is an equidigital number, since it uses as much as digits as its factorization.

2100202211021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2100202211021 its reverse (1201122020012), we get a palindrome (3301324231033).

The spelling of 2100202211021 in words is "two trillion, one hundred billion, two hundred two million, two hundred eleven thousand, twenty-one".