2100022081121 has 2 divisors, whose sum is σ = 2100022081122. Its totient is φ = 2100022081120.

The previous prime is 2100022081043. The next prime is 2100022081127. The reversal of 2100022081121 is 1211802200012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1815591858721 + 284430222400 = 1347439^2 + 533320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100022081121 - 2³⁰ = 2098948339297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100022081093 and 2100022081102.

It is not a weakly prime, because it can be changed into another prime (2100022081127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050011040560 + 1050011040561.

It is an arithmetic number, because the mean of its divisors is an integer number (1050011040561).

Almost surely, 2^{2100022081121} is an apocalyptic number.

It is an amenable number.

2100022081121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100022081121 is an equidigital number, since it uses as much as digits as its factorization.

2100022081121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 2100022081121 its reverse (1211802200012), we get a palindrome (3311824281133).

The spelling of 2100022081121 in words is "two trillion, one hundred billion, twenty-two million, eighty-one thousand, one hundred twenty-one".