101001021 has 8 divisors (see below), whose sum is σ = 146910624. Its totient is φ = 61212720.

The previous prime is 101001013. The next prime is 101001037. The reversal of 101001021 is 120100101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101001021 - 2³ = 101001013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001001) 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 7 ways as a sum of consecutive naturals, for example, 1530286 + ... + 1530351.

It is an arithmetic number, because the mean of its divisors is an integer number (18363828).

Almost surely, 2^101001021 is an apocalyptic number.

101001021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101001021 is a deficient number, since it is larger than the sum of its proper divisors (45909603).

101001021 is a wasteful number, since it uses less digits than its factorization.

101001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060651.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 101001021 is about 10049.9264176411. The cubic root of 101001021 is about 465.7025200182.

Adding to 101001021 its reverse (120100101), we get a palindrome (221101122).

The spelling of 101001021 in words is "one hundred one million, one thousand, twenty-one".