2121513442252 has 12 divisors (see below), whose sum is σ = 3832411379776. Its totient is φ = 1026538762320.

The previous prime is 2121513442193. The next prime is 2121513442271. The reversal of 2121513442252 is 2522443151212.

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, 8554489563 + ... + 8554489810.

Almost surely, 2^{2121513442252} is an apocalyptic number.

It is an amenable number.

2121513442252 is a deficient number, since it is larger than the sum of its proper divisors (1710897937524).

2121513442252 is a wasteful number, since it uses less digits than its factorization.

2121513442252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17108979408 (or 17108979406 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

Adding to 2121513442252 its reverse (2522443151212), we get a palindrome (4643956593464).

The spelling of 2121513442252 in words is "two trillion, one hundred twenty-one billion, five hundred thirteen million, four hundred forty-two thousand, two hundred fifty-two".