201124981 has 2 divisors, whose sum is σ = 201124982. Its totient is φ = 201124980.

The previous prime is 201124961. The next prime is 201124997. The reversal of 201124981 is 189421102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185204881 + 15920100 = 13609^2 + 3990^2 .

It is a cyclic number.

It is not a de Polignac number, because 201124981 - 2¹³ = 201116789 is a prime.

It is a super-2 number, since 2×201124981² = 80902515964500722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201124961) 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 as a sum of consecutive naturals, namely, 100562490 + 100562491.

It is an arithmetic number, because the mean of its divisors is an integer number (100562491).

Almost surely, 2^201124981 is an apocalyptic number.

It is an amenable number.

201124981 is a deficient number, since it is larger than the sum of its proper divisors (1).

201124981 is an equidigital number, since it uses as much as digits as its factorization.

201124981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 201124981 is about 14181.8539338127. The cubic root of 201124981 is about 585.8979862956.

The spelling of 201124981 in words is "two hundred one million, one hundred twenty-four thousand, nine hundred eighty-one".