2130213312121 has 2 divisors, whose sum is σ = 2130213312122. Its totient is φ = 2130213312120.

The previous prime is 2130213312107. The next prime is 2130213312173. The reversal of 2130213312121 is 1212133120312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1225584057721 + 904629254400 = 1107061^2 + 951120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130213312121 - 2¹¹ = 2130213310073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2130213312092 and 2130213312101.

It is not a weakly prime, because it can be changed into another prime (2130213312181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065106656060 + 1065106656061.

It is an arithmetic number, because the mean of its divisors is an integer number (1065106656061).

Almost surely, 2^{2130213312121} is an apocalyptic number.

It is an amenable number.

2130213312121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130213312121 is an equidigital number, since it uses as much as digits as its factorization.

2130213312121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 2130213312121 its reverse (1212133120312), we get a palindrome (3342346432433).

The spelling of 2130213312121 in words is "two trillion, one hundred thirty billion, two hundred thirteen million, three hundred twelve thousand, one hundred twenty-one".