2121220021112 has 16 divisors (see below), whose sum is σ = 3977539233360. Its totient is φ = 1060542892224.

The previous prime is 2121220021103. The next prime is 2121220021121. The reversal of 2121220021112 is 2111200221212.

It is an interprime number because it is at equal distance from previous prime (2121220021103) and next prime (2121220021121).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8255348 + ... + 8508419.

It is an arithmetic number, because the mean of its divisors is an integer number (248596202085).

Almost surely, 2^{2121220021112} is an apocalyptic number.

It is an amenable number.

2121220021112 is a deficient number, since it is larger than the sum of its proper divisors (1856319212248).

2121220021112 is a wasteful number, since it uses less digits than its factorization.

2121220021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16779590 (or 16779586 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2121220021112 its reverse (2111200221212), we get a palindrome (4232420242324).

The spelling of 2121220021112 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, twenty-one thousand, one hundred twelve".