2021211100121 has 2 divisors, whose sum is σ = 2021211100122. Its totient is φ = 2021211100120.

The previous prime is 2021211100093. The next prime is 2021211100127. The reversal of 2021211100121 is 1210011121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1625469453721 + 395741646400 = 1274939^2 + 629080^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021211100121 - 2⁶ = 2021211100057 is a prime.

It is a super-2 number, since 2×2021211100121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021211100096 and 2021211100105.

It is not a weakly prime, because it can be changed into another prime (2021211100127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010605550060 + 1010605550061.

It is an arithmetic number, because the mean of its divisors is an integer number (1010605550061).

Almost surely, 2^{2021211100121} is an apocalyptic number.

It is an amenable number.

2021211100121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021211100121 is an equidigital number, since it uses as much as digits as its factorization.

2021211100121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021211100121 its reverse (1210011121202), we get a palindrome (3231222221323).

The spelling of 2021211100121 in words is "two trillion, twenty-one billion, two hundred eleven million, one hundred thousand, one hundred twenty-one".