212293206261 has 10 divisors (see below), whose sum is σ = 317129357622. Its totient is φ = 141528804120.

The previous prime is 212293206247. The next prime is 212293206277. The reversal of 212293206261 is 162602392212.

212293206261 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 9 + 3 + 20 + 626 + 1 = 666.

212293206261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 202419008100 + 9874198161 = 449910^2 + 99369^2 .

It is not a de Polignac number, because 212293206261 - 2¹⁸ = 212292944117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212293206211) 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 in 9 ways as a sum of consecutive naturals, for example, 1310451810 + ... + 1310451971.

Almost surely, 2^212293206261 is an apocalyptic number.

It is an amenable number.

212293206261 is a deficient number, since it is larger than the sum of its proper divisors (104836151361).

212293206261 is an equidigital number, since it uses as much as digits as its factorization.

212293206261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620903793 (or 2620903784 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 212293206261 its reverse (162602392212), we get a palindrome (374895598473).

The spelling of 212293206261 in words is "two hundred twelve billion, two hundred ninety-three million, two hundred six thousand, two hundred sixty-one".