101542121 has 4 divisors (see below), whose sum is σ = 101699712. Its totient is φ = 101384532.

The previous prime is 101542093. The next prime is 101542123. The reversal of 101542121 is 121245101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121245101 = 47 ⋅2579683.

It is a cyclic number.

It is not a de Polignac number, because 101542121 - 2⁶ = 101542057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 101542121.

It is not an unprimeable number, because it can be changed into a prime (101542123) 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, 77825 + ... + 79118.

It is an arithmetic number, because the mean of its divisors is an integer number (25424928).

Almost surely, 2^101542121 is an apocalyptic number.

It is an amenable number.

101542121 is a deficient number, since it is larger than the sum of its proper divisors (157591).

101542121 is an equidigital number, since it uses as much as digits as its factorization.

101542121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157590.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 101542121 is about 10076.8110531060. The cubic root of 101542121 is about 466.5326864245.

Adding to 101542121 its reverse (121245101), we get a palindrome (222787222).

The spelling of 101542121 in words is "one hundred one million, five hundred forty-two thousand, one hundred twenty-one".