2121123223300 has 36 divisors (see below), whose sum is σ = 4603445555940. Its totient is φ = 848337185920.

The previous prime is 2121123223291. The next prime is 2121123223301. The reversal of 2121123223300 is 33223211212.

It can be written as a sum of positive squares in 6 ways, for example, as 263310607044 + 1857812616256 = 513138^2 + 1363016^2 .

It is not an unprimeable number, because it can be changed into a prime (2121123223301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 638599 + ... + 2156398.

It is an arithmetic number, because the mean of its divisors is an integer number (127873487665).

Almost surely, 2^{2121123223300} is an apocalyptic number.

2121123223300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121123223300 is an abundant number, since it is smaller than the sum of its proper divisors (2482322332640).

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

2121123223300 is a wasteful number, since it uses less digits than its factorization.

2121123223300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2802600 (or 2802593 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2121123223300 its reverse (33223211212), we get a palindrome (2154346434512).

The spelling of 2121123223300 in words is "two trillion, one hundred twenty-one billion, one hundred twenty-three million, two hundred twenty-three thousand, three hundred".