2121001011112 has 16 divisors (see below), whose sum is σ = 4003213831200. Its totient is φ = 1053477322800.

The previous prime is 2121001011091. The next prime is 2121001011113. The reversal of 2121001011112 is 2111101001212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2121001011092 and 2121001011101.

It is not an unprimeable number, because it can be changed into a prime (2121001011113) 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, 877896562 + ... + 877898977.

It is an arithmetic number, because the mean of its divisors is an integer number (250200864450).

Almost surely, 2^{2121001011112} is an apocalyptic number.

It is an amenable number.

2121001011112 is a deficient number, since it is larger than the sum of its proper divisors (1882212820088).

2121001011112 is a wasteful number, since it uses less digits than its factorization.

2121001011112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755795696 (or 1755795692 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 2121001011112 its reverse (2111101001212), we get a palindrome (4232102012324).

The spelling of 2121001011112 in words is "two trillion, one hundred twenty-one billion, one million, eleven thousand, one hundred twelve".