2121243036652 has 24 divisors (see below), whose sum is σ = 3961487706624. Its totient is φ = 990371918592.

The previous prime is 2121243036637. The next prime is 2121243036683. The reversal of 2121243036652 is 2566303421212.

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, 122805343 + ... + 122822614.

It is an arithmetic number, because the mean of its divisors is an integer number (165061987776).

Almost surely, 2^{2121243036652} is an apocalyptic number.

It is an amenable number.

2121243036652 is a deficient number, since it is larger than the sum of its proper divisors (1840244669972).

2121243036652 is a wasteful number, since it uses less digits than its factorization.

2121243036652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245628105 (or 245628103 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 2121243036652 its reverse (2566303421212), we get a palindrome (4687546457864).

The spelling of 2121243036652 in words is "two trillion, one hundred twenty-one billion, two hundred forty-three million, thirty-six thousand, six hundred fifty-two".