101215133 has 4 divisors (see below), whose sum is σ = 104705340. Its totient is φ = 97724928.

The previous prime is 101215129. The next prime is 101215141. The reversal of 101215133 is 331512101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27478564 + 73736569 = 5242^2 + 8587^2 .

It is a cyclic number.

It is not a de Polignac number, because 101215133 - 2² = 101215129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101215733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1745060 + ... + 1745117.

It is an arithmetic number, because the mean of its divisors is an integer number (26176335).

Almost surely, 2^101215133 is an apocalyptic number.

It is an amenable number.

101215133 is a deficient number, since it is larger than the sum of its proper divisors (3490207).

101215133 is an equidigital number, since it uses as much as digits as its factorization.

101215133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490206.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 101215133 is about 10060.5731944060. The cubic root of 101215133 is about 466.0313685774.

Adding to 101215133 its reverse (331512101), we get a palindrome (432727234).

The spelling of 101215133 in words is "one hundred one million, two hundred fifteen thousand, one hundred thirty-three".