101123021 has 4 divisors (see below), whose sum is σ = 107071452. Its totient is φ = 95174592.

The previous prime is 101123017. The next prime is 101123027. The reversal of 101123021 is 120321101.

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 27678121 + 73444900 = 5261^2 + 8570^2 .

It is a cyclic number.

It is not a de Polignac number, because 101123021 - 2² = 101123017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101122993 and 101123011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101123027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2974190 + ... + 2974223.

It is an arithmetic number, because the mean of its divisors is an integer number (26767863).

Almost surely, 2^101123021 is an apocalyptic number.

It is an amenable number.

101123021 is a deficient number, since it is larger than the sum of its proper divisors (5948431).

101123021 is an equidigital number, since it uses as much as digits as its factorization.

101123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5948430.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 101123021 is about 10055.9942820191. The cubic root of 101123021 is about 465.8899532612.

Adding to 101123021 its reverse (120321101), we get a palindrome (221444122).

The spelling of 101123021 in words is "one hundred one million, one hundred twenty-three thousand, twenty-one".