2121213021112 has 32 divisors (see below), whose sum is σ = 4222962280800. Its totient is φ = 995437318144.

The previous prime is 2121213021107. The next prime is 2121213021131. The reversal of 2121213021112 is 2111203121212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121213021112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21674233 + ... + 21771880.

It is an arithmetic number, because the mean of its divisors is an integer number (131967571275).

Almost surely, 2^{2121213021112} is an apocalyptic number.

It is an amenable number.

2121213021112 is a deficient number, since it is larger than the sum of its proper divisors (2101749259688).

2121213021112 is a wasteful number, since it uses less digits than its factorization.

2121213021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43446495 (or 43446491 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2121213021112 its reverse (2111203121212), we get a palindrome (4232416142324).

The spelling of 2121213021112 in words is "two trillion, one hundred twenty-one billion, two hundred thirteen million, twenty-one thousand, one hundred twelve".