2112120111021 has 8 divisors (see below), whose sum is σ = 2816951885664. Its totient is φ = 1407684205200.

The previous prime is 2112120110993. The next prime is 2112120111077. The reversal of 2112120111021 is 1201110212112.

It is a happy number.

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

It is not a de Polignac number, because 2112120111021 - 2³⁹ = 1562364297133 is a prime.

It is a super-2 number, since 2×2112120111021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112120112021) 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, 98954755 + ... + 98976096.

It is an arithmetic number, because the mean of its divisors is an integer number (352118985708).

Almost surely, 2^{2112120111021} is an apocalyptic number.

It is an amenable number.

2112120111021 is a deficient number, since it is larger than the sum of its proper divisors (704831774643).

2112120111021 is a wasteful number, since it uses less digits than its factorization.

2112120111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197934411.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 2112120111021 its reverse (1201110212112), we get a palindrome (3313230323133).

It can be divided in two parts, 2112 and 120111021, that multiplied together give a palindrome (253674476352).

The spelling of 2112120111021 in words is "two trillion, one hundred twelve billion, one hundred twenty million, one hundred eleven thousand, twenty-one".