212158130461 has 2 divisors, whose sum is σ = 212158130462. Its totient is φ = 212158130460.

The previous prime is 212158130441. The next prime is 212158130497. The reversal of 212158130461 is 164031851212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163301659236 + 48856471225 = 404106^2 + 221035^2 .

It is a cyclic number.

It is not a de Polignac number, because 212158130461 - 2¹³ = 212158122269 is a prime.

It is a super-2 number, since 2×212158130461² (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 (212158130441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106079065230 + 106079065231.

It is an arithmetic number, because the mean of its divisors is an integer number (106079065231).

Almost surely, 2^212158130461 is an apocalyptic number.

It is an amenable number.

212158130461 is a deficient number, since it is larger than the sum of its proper divisors (1).

212158130461 is an equidigital number, since it uses as much as digits as its factorization.

212158130461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 34.

Adding to 212158130461 its reverse (164031851212), we get a palindrome (376189981673).

The spelling of 212158130461 in words is "two hundred twelve billion, one hundred fifty-eight million, one hundred thirty thousand, four hundred sixty-one".