213131011111421 has 32 divisors (see below), whose sum is σ = 238183218282240. Its totient is φ = 189453853324800.

The previous prime is 213131011111399. The next prime is 213131011111433. The reversal of 213131011111421 is 124111110131312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213131011111421 is a prime.

It is a super-3 number, since 3×213131011111421³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213131011111021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8305106 + ... + 22253916.

It is an arithmetic number, because the mean of its divisors is an integer number (7443225571320).

Almost surely, 2^{213131011111421} is an apocalyptic number.

It is an amenable number.

213131011111421 is a deficient number, since it is larger than the sum of its proper divisors (25052207170819).

213131011111421 is a wasteful number, since it uses less digits than its factorization.

213131011111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13949237.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 213131011111421 its reverse (124111110131312), we get a palindrome (337242121242733).

The spelling of 213131011111421 in words is "two hundred thirteen trillion, one hundred thirty-one billion, eleven million, one hundred eleven thousand, four hundred twenty-one".