2123202555121 has 2 divisors, whose sum is σ = 2123202555122. Its totient is φ = 2123202555120.

The previous prime is 2123202555113. The next prime is 2123202555127. The reversal of 2123202555121 is 1215552023212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2015988221025 + 107214334096 = 1419855^2 + 327436^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123202555121 - 2³ = 2123202555113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2123202555127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061601277560 + 1061601277561.

It is an arithmetic number, because the mean of its divisors is an integer number (1061601277561).

Almost surely, 2^{2123202555121} is an apocalyptic number.

It is an amenable number.

2123202555121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123202555121 is an equidigital number, since it uses as much as digits as its factorization.

2123202555121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 2123202555121 its reverse (1215552023212), we get a palindrome (3338754578333).

The spelling of 2123202555121 in words is "two trillion, one hundred twenty-three billion, two hundred two million, five hundred fifty-five thousand, one hundred twenty-one".