2021111112121 has 8 divisors (see below), whose sum is σ = 2127506284800. Its totient is φ = 1914718029840.

The previous prime is 2021111112109. The next prime is 2021111112127. The reversal of 2021111112121 is 1212111111202.

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 2021111112121 - 2⁹ = 2021111111609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2021111112095 and 2021111112104.

It is not an unprimeable number, because it can be changed into a prime (2021111112127) 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, 1705656 + ... + 2636566.

It is an arithmetic number, because the mean of its divisors is an integer number (265938285600).

Almost surely, 2^{2021111112121} is an apocalyptic number.

It is an amenable number.

2021111112121 is a deficient number, since it is larger than the sum of its proper divisors (106395172679).

2021111112121 is a wasteful number, since it uses less digits than its factorization.

2021111112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045199.

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

Adding to 2021111112121 its reverse (1212111111202), we get a palindrome (3233222223323).

The spelling of 2021111112121 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty-one".