2121513112 has 16 divisors (see below), whose sum is σ = 3980966400. Its totient is φ = 1059922080.

The previous prime is 2121513103. The next prime is 2121513131. The reversal of 2121513112 is 2113151212.

It is a self number, because there is not a number n which added to its sum of digits gives 2121513112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93439 + ... + 113902.

It is an arithmetic number, because the mean of its divisors is an integer number (248810400).

Almost surely, 2^2121513112 is an apocalyptic number.

It is an amenable number.

2121513112 is a deficient number, since it is larger than the sum of its proper divisors (1859453288).

2121513112 is a wasteful number, since it uses less digits than its factorization.

2121513112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208626 (or 208622 counting only the distinct ones).

The product of its digits is 120, while the sum is 19.

The square root of 2121513112 is about 46059.8861483612. The cubic root of 2121513112 is about 1284.9372126356.

Adding to 2121513112 its reverse (2113151212), we get a palindrome (4234664324).

The spelling of 2121513112 in words is "two billion, one hundred twenty-one million, five hundred thirteen thousand, one hundred twelve".