212320121231 has 2 divisors, whose sum is σ = 212320121232. Its totient is φ = 212320121230.

The previous prime is 212320121179. The next prime is 212320121243. The reversal of 212320121231 is 132121023212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212320121231 is a prime.

It is a super-3 number, since 3×212320121231³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212320124231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106160060615 + 106160060616.

It is an arithmetic number, because the mean of its divisors is an integer number (106160060616).

Almost surely, 2^212320121231 is an apocalyptic number.

212320121231 is a deficient number, since it is larger than the sum of its proper divisors (1).

212320121231 is an equidigital number, since it uses as much as digits as its factorization.

212320121231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 212320121231 its reverse (132121023212), we get a palindrome (344441144443).

The spelling of 212320121231 in words is "two hundred twelve billion, three hundred twenty million, one hundred twenty-one thousand, two hundred thirty-one".