101018381 has 2 divisors, whose sum is σ = 101018382. Its totient is φ = 101018380.

The previous prime is 101018341. The next prime is 101018413. The reversal of 101018381 is 183810101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87254281 + 13764100 = 9341^2 + 3710^2 .

It is a cyclic number.

It is not a de Polignac number, because 101018381 - 2⁶ = 101018317 is a prime.

It is a super-2 number, since 2×101018381² = 20409426599722322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101018311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50509190 + 50509191.

It is an arithmetic number, because the mean of its divisors is an integer number (50509191).

Almost surely, 2^101018381 is an apocalyptic number.

It is an amenable number.

101018381 is a deficient number, since it is larger than the sum of its proper divisors (1).

101018381 is an equidigital number, since it uses as much as digits as its factorization.

101018381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 101018381 is about 10050.7900684474. The cubic root of 101018381 is about 465.7292000541.

Adding to 101018381 its reverse (183810101), we get a palindrome (284828482).

It can be divided in two parts, 1010 and 18381, that added together give a palindrome (19391).

The spelling of 101018381 in words is "one hundred one million, eighteen thousand, three hundred eighty-one".