1000111000021 has 8 divisors (see below), whose sum is σ = 1143926288384. Its totient is φ = 856531283760.

The previous prime is 1000111000019. The next prime is 1000111000069. The reversal of 1000111000021 is 1200001110001.

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

It is a cyclic number.

It is not a de Polignac number, because 1000111000021 - 2¹ = 1000111000019 is a prime.

It is a super-3 number, since 3×1000111000021³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000110999968 and 1000111000013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000111000001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58883925 + ... + 58900906.

It is an arithmetic number, because the mean of its divisors is an integer number (142990786048).

Almost surely, 2^{1000111000021} is an apocalyptic number.

It is an amenable number.

1000111000021 is a deficient number, since it is larger than the sum of its proper divisors (143815288363).

1000111000021 is a wasteful number, since it uses less digits than its factorization.

1000111000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117786051.

The product of its (nonzero) digits is 2, while the sum is 7.

Adding to 1000111000021 its reverse (1200001110001), we get a palindrome (2200112110022).

The spelling of 1000111000021 in words is "one trillion, one hundred eleven million, twenty-one", and thus it is an aban number.