101012021 has 12 divisors (see below), whose sum is σ = 115200960. Its totient is φ = 87831480.

The previous prime is 101011991. The next prime is 101012029. The reversal of 101012021 is 120210101.

It is a de Polignac number, because none of the positive numbers 2^k-101012021 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 (101012029) 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 11 ways as a sum of consecutive naturals, for example, 2861 + ... + 14498.

It is an arithmetic number, because the mean of its divisors is an integer number (9600080).

Almost surely, 2^101012021 is an apocalyptic number.

101012021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101012021 is a deficient number, since it is larger than the sum of its proper divisors (14188939).

101012021 is a wasteful number, since it uses less digits than its factorization.

101012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17416 (or 17393 counting only the distinct ones).

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

The square root of 101012021 is about 10050.4736704297. The cubic root of 101012021 is about 465.7194259257.

Adding to 101012021 its reverse (120210101), we get a palindrome (221222122).

It can be divided in two parts, 1010 and 12021, that added together give a palindrome (13031).

The spelling of 101012021 in words is "one hundred one million, twelve thousand, twenty-one".