2021021111001 has 8 divisors (see below), whose sum is σ = 2811855458880. Its totient is φ = 1288767085232.

The previous prime is 2021021110991. The next prime is 2021021111063. The reversal of 2021021111001 is 1001111201202.

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 2021021111001 - 2³³ = 2012431176409 is a prime.

It is a super-2 number, since 2×2021021111001² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021021111101) 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, 14645080446 + ... + 14645080583.

It is an arithmetic number, because the mean of its divisors is an integer number (351481932360).

Almost surely, 2^{2021021111001} is an apocalyptic number.

It is an amenable number.

2021021111001 is a deficient number, since it is larger than the sum of its proper divisors (790834347879).

2021021111001 is a wasteful number, since it uses less digits than its factorization.

2021021111001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29290161055.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 2021021111001 its reverse (1001111201202), we get a palindrome (3022132312203).

The spelling of 2021021111001 in words is "two trillion, twenty-one billion, twenty-one million, one hundred eleven thousand, one".