2021111122001 has 12 divisors (see below), whose sum is σ = 2157872113200. Its totient is φ = 1887768638280.

The previous prime is 2021111121983. The next prime is 2021111122021. The reversal of 2021111122001 is 1002211111202.

It is not a de Polignac number, because 2021111122001 - 2¹⁸ = 2021110859857 is a prime.

It is a super-2 number, since 2×2021111122001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2021111122021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10455131 + ... + 10646688.

It is an arithmetic number, because the mean of its divisors is an integer number (179822676100).

Almost surely, 2^{2021111122001} is an apocalyptic number.

It is an amenable number.

2021111122001 is a deficient number, since it is larger than the sum of its proper divisors (136760991199).

2021111122001 is an equidigital number, since it uses as much as digits as its factorization.

2021111122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21101980 (or 21101909 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2021111122001 its reverse (1002211111202), we get a palindrome (3023322233203).

The spelling of 2021111122001 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, one".