2121163306600 has 48 divisors (see below), whose sum is σ = 5311066593420. Its totient is φ = 783198758400.

The previous prime is 2121163306579. The next prime is 2121163306631. The reversal of 2121163306600 is 66033611212.

It can be written as a sum of positive squares in 6 ways, for example, as 241900683556 + 1879262623044 = 491834^2 + 1370862^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 407913421 + ... + 407918620.

Almost surely, 2^{2121163306600} is an apocalyptic number.

2121163306600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121163306600 is an abundant number, since it is smaller than the sum of its proper divisors (3189903286820).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121163306600 is a wasteful number, since it uses less digits than its factorization.

2121163306600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815832070 (or 815832061 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

Adding to 2121163306600 its reverse (66033611212), we get a palindrome (2187196917812).

The spelling of 2121163306600 in words is "two trillion, one hundred twenty-one billion, one hundred sixty-three million, three hundred six thousand, six hundred".