213223022111261 has 2 divisors, whose sum is σ = 213223022111262. Its totient is φ = 213223022111260.

The previous prime is 213223022111243. The next prime is 213223022111291. The reversal of 213223022111261 is 162111220322312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174573300839161 + 38649721272100 = 13212619^2 + 6216890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213223022111261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213223022111291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106611511055630 + 106611511055631.

It is an arithmetic number, because the mean of its divisors is an integer number (106611511055631).

Almost surely, 2^{213223022111261} is an apocalyptic number.

It is an amenable number.

213223022111261 is a deficient number, since it is larger than the sum of its proper divisors (1).

213223022111261 is an equidigital number, since it uses as much as digits as its factorization.

213223022111261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 29.

Adding to 213223022111261 its reverse (162111220322312), we get a palindrome (375334242433573).

The spelling of 213223022111261 in words is "two hundred thirteen trillion, two hundred twenty-three billion, twenty-two million, one hundred eleven thousand, two hundred sixty-one".