213121131199 has 2 divisors, whose sum is σ = 213121131200. Its totient is φ = 213121131198.

The previous prime is 213121131149. The next prime is 213121131239. The reversal of 213121131199 is 991131121312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213121131199 - 2⁹ = 213121130687 is a prime.

It is a super-3 number, since 3×213121131199³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213121131149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106560565599 + 106560565600.

It is an arithmetic number, because the mean of its divisors is an integer number (106560565600).

Almost surely, 2^213121131199 is an apocalyptic number.

213121131199 is a deficient number, since it is larger than the sum of its proper divisors (1).

213121131199 is an equidigital number, since it uses as much as digits as its factorization.

213121131199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 34.

It can be divided in two parts, 21312 and 1131199, that added together give a palindrome (1152511).

The spelling of 213121131199 in words is "two hundred thirteen billion, one hundred twenty-one million, one hundred thirty-one thousand, one hundred ninety-nine".