213422123461 has 2 divisors, whose sum is σ = 213422123462. Its totient is φ = 213422123460.

The previous prime is 213422123417. The next prime is 213422123477. The reversal of 213422123461 is 164321224312.

213422123461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185476648900 + 27945474561 = 430670^2 + 167169^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213422123461 is a prime.

It is a super-3 number, since 3×213422123461³ (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 (213422129461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106711061730 + 106711061731.

It is an arithmetic number, because the mean of its divisors is an integer number (106711061731).

Almost surely, 2^213422123461 is an apocalyptic number.

It is an amenable number.

213422123461 is a deficient number, since it is larger than the sum of its proper divisors (1).

213422123461 is an equidigital number, since it uses as much as digits as its factorization.

213422123461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

Adding to 213422123461 its reverse (164321224312), we get a palindrome (377743347773).

The spelling of 213422123461 in words is "two hundred thirteen billion, four hundred twenty-two million, one hundred twenty-three thousand, four hundred sixty-one".