2121324630556 has 6 divisors (see below), whose sum is σ = 3712318103480. Its totient is φ = 1060662315276.

The previous prime is 2121324630457. The next prime is 2121324630563. The reversal of 2121324630556 is 6550364231212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265165578816 + ... + 265165578823.

Almost surely, 2^{2121324630556} is an apocalyptic number.

It is an amenable number.

2121324630556 is a deficient number, since it is larger than the sum of its proper divisors (1590993472924).

2121324630556 is a wasteful number, since it uses less digits than its factorization.

2121324630556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530331157643 (or 530331157641 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

Adding to 2121324630556 its reverse (6550364231212), we get a palindrome (8671688861768).

The spelling of 2121324630556 in words is "two trillion, one hundred twenty-one billion, three hundred twenty-four million, six hundred thirty thousand, five hundred fifty-six".