2121604432450 has 96 divisors (see below), whose sum is σ = 4020051606480. Its totient is φ = 832915353600.

The previous prime is 2121604432421. The next prime is 2121604432481. The reversal of 2121604432450 is 542344061212.

It can be written as a sum of positive squares in 24 ways, for example, as 1491014387041 + 630590045409 = 1221071^2 + 794097^2 .

It is a super-2 number, since 2×2121604432450² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 493738702 + ... + 493742998.

Almost surely, 2^{2121604432450} is an apocalyptic number.

2121604432450 is a deficient number, since it is larger than the sum of its proper divisors (1898447174030).

2121604432450 is a wasteful number, since it uses less digits than its factorization.

2121604432450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5192 (or 5187 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 2121604432450 its reverse (542344061212), we get a palindrome (2663948493662).

The spelling of 2121604432450 in words is "two trillion, one hundred twenty-one billion, six hundred four million, four hundred thirty-two thousand, four hundred fifty".