201212119981 has 2 divisors, whose sum is σ = 201212119982. Its totient is φ = 201212119980.

The previous prime is 201212119967. The next prime is 201212120017. The reversal of 201212119981 is 189911212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201179160900 + 32959081 = 448530^2 + 5741^2 .

It is a cyclic number.

It is not a de Polignac number, because 201212119981 - 2²⁹ = 200675249069 is a prime.

It is a super-2 number, since 2×201212119981² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201212119981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201212113981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100606059990 + 100606059991.

It is an arithmetic number, because the mean of its divisors is an integer number (100606059991).

Almost surely, 2^201212119981 is an apocalyptic number.

It is an amenable number.

201212119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

201212119981 is an equidigital number, since it uses as much as digits as its factorization.

201212119981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 201212119981 in words is "two hundred one billion, two hundred twelve million, one hundred nineteen thousand, nine hundred eighty-one".