101512381 has 2 divisors, whose sum is σ = 101512382. Its totient is φ = 101512380.

The previous prime is 101512361. The next prime is 101512429. The reversal of 101512381 is 183215101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98505625 + 3006756 = 9925^2 + 1734^2 .

It is a cyclic number.

It is not a de Polignac number, because 101512381 - 2¹³ = 101504189 is a prime.

It is a super-2 number, since 2×101512381² = 20609526992578322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101512361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50756190 + 50756191.

It is an arithmetic number, because the mean of its divisors is an integer number (50756191).

Almost surely, 2^101512381 is an apocalyptic number.

It is an amenable number.

101512381 is a deficient number, since it is larger than the sum of its proper divisors (1).

101512381 is an equidigital number, since it uses as much as digits as its factorization.

101512381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 101512381 is about 10075.3352797810. The cubic root of 101512381 is about 466.4871354199.

Adding to 101512381 its reverse (183215101), we get a palindrome (284727482).

The spelling of 101512381 in words is "one hundred one million, five hundred twelve thousand, three hundred eighty-one".