2021110211123 has 4 divisors (see below), whose sum is σ = 2070405582168. Its totient is φ = 1971814840080.

The previous prime is 2021110211101. The next prime is 2021110211143. The reversal of 2021110211123 is 3211120111202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2021110211123 - 2¹² = 2021110207027 is a prime.

It is a super-2 number, since 2×2021110211123² (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 (2021110211143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24647685461 + ... + 24647685542.

It is an arithmetic number, because the mean of its divisors is an integer number (517601395542).

Almost surely, 2^{2021110211123} is an apocalyptic number.

2021110211123 is a deficient number, since it is larger than the sum of its proper divisors (49295371045).

2021110211123 is an equidigital number, since it uses as much as digits as its factorization.

2021110211123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49295371044.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 2021110211123 its reverse (3211120111202), we get a palindrome (5232230322325).

The spelling of 2021110211123 in words is "two trillion, twenty-one billion, one hundred ten million, two hundred eleven thousand, one hundred twenty-three".