212102211200981 has 2 divisors, whose sum is σ = 212102211200982. Its totient is φ = 212102211200980.

The previous prime is 212102211200969. The next prime is 212102211201037. The reversal of 212102211200981 is 189002112201212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201669253060900 + 10432958140081 = 14201030^2 + 3230009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212102211200981 is a prime.

It is a super-2 number, since 2×212102211200981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212102211209981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051105600490 + 106051105600491.

It is an arithmetic number, because the mean of its divisors is an integer number (106051105600491).

Almost surely, 2^{212102211200981} is an apocalyptic number.

It is an amenable number.

212102211200981 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102211200981 is an equidigital number, since it uses as much as digits as its factorization.

212102211200981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 32.

The spelling of 212102211200981 in words is "two hundred twelve trillion, one hundred two billion, two hundred eleven million, two hundred thousand, nine hundred eighty-one".