212011012981 has 2 divisors, whose sum is σ = 212011012982. Its totient is φ = 212011012980.

The previous prime is 212011012963. The next prime is 212011013051. The reversal of 212011012981 is 189210110212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155192663025 + 56818349956 = 393945^2 + 238366^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011012981 - 2¹¹ = 212011010933 is a prime.

It is a super-2 number, since 2×212011012981² (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 (212011042981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005506490 + 106005506491.

It is an arithmetic number, because the mean of its divisors is an integer number (106005506491).

Almost surely, 2^212011012981 is an apocalyptic number.

It is an amenable number.

212011012981 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011012981 is an equidigital number, since it uses as much as digits as its factorization.

212011012981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 212011012981 in words is "two hundred twelve billion, eleven million, twelve thousand, nine hundred eighty-one".