102012101 has 4 divisors (see below), whose sum is σ = 102306432. Its totient is φ = 101717772.

The previous prime is 102012091. The next prime is 102012133. The reversal of 102012101 is 101210201.

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: 101210201 = 331 ⋅305771.

It is a cyclic number.

It is not a de Polignac number, because 102012101 - 2¹⁸ = 101749957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146645 + ... + 147338.

It is an arithmetic number, because the mean of its divisors is an integer number (25576608).

Almost surely, 2^102012101 is an apocalyptic number.

It is an amenable number.

102012101 is a deficient number, since it is larger than the sum of its proper divisors (294331).

102012101 is an equidigital number, since it uses as much as digits as its factorization.

102012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294330.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 102012101 is about 10100.1040093654. The cubic root of 102012101 is about 467.2513491800.

Adding to 102012101 its reverse (101210201), we get a palindrome (203222302).

The spelling of 102012101 in words is "one hundred two million, twelve thousand, one hundred one".