211232121013 has 2 divisors, whose sum is σ = 211232121014. Its totient is φ = 211232121012.

The previous prime is 211232120999. The next prime is 211232121017. The reversal of 211232121013 is 310121232112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179781936049 + 31450184964 = 424007^2 + 177342^2 .

It is a cyclic number.

It is not a de Polignac number, because 211232121013 - 2¹³ = 211232112821 is a prime.

It is a super-2 number, since 2×211232121013² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211232121017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105616060506 + 105616060507.

It is an arithmetic number, because the mean of its divisors is an integer number (105616060507).

Almost surely, 2^211232121013 is an apocalyptic number.

It is an amenable number.

211232121013 is a deficient number, since it is larger than the sum of its proper divisors (1).

211232121013 is an equidigital number, since it uses as much as digits as its factorization.

211232121013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 211232121013 its reverse (310121232112), we get a palindrome (521353353125).

The spelling of 211232121013 in words is "two hundred eleven billion, two hundred thirty-two million, one hundred twenty-one thousand, thirteen".