101102021 has 6 divisors (see below), whose sum is σ = 106703622. Its totient is φ = 95780520.

The previous prime is 101102003. The next prime is 101102039. The reversal of 101102021 is 120201101.

It is an interprime number because it is at equal distance from previous prime (101102003) and next prime (101102039).

It can be written as a sum of positive squares in only one way, i.e., 92428996 + 8673025 = 9614^2 + 2945^2 .

It is not a de Polignac number, because 101102021 - 2¹⁰ = 101100997 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 (101102081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139670 + ... + 140391.

It is an arithmetic number, because the mean of its divisors is an integer number (17783937).

Almost surely, 2^101102021 is an apocalyptic number.

It is an amenable number.

101102021 is a deficient number, since it is larger than the sum of its proper divisors (5601601).

101102021 is an equidigital number, since it uses as much as digits as its factorization.

101102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280099 (or 280080 counting only the distinct ones).

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

The square root of 101102021 is about 10054.9500744658. The cubic root of 101102021 is about 465.8577009074.

Adding to 101102021 its reverse (120201101), we get a palindrome (221303122).

The spelling of 101102021 in words is "one hundred one million, one hundred two thousand, twenty-one".