1321211100200 has 24 divisors (see below), whose sum is σ = 3071815808430. Its totient is φ = 528484440000.

The previous prime is 1321211100113. The next prime is 1321211100229. The reversal of 1321211100200 is 20011121231.

It can be written as a sum of positive squares in 3 ways, for example, as 602849756356 + 718361343844 = 776434^2 + 847562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3303027551 + ... + 3303027950.

Almost surely, 2^{1321211100200} is an apocalyptic number.

1321211100200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321211100200 is an abundant number, since it is smaller than the sum of its proper divisors (1750604708230).

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

1321211100200 is a wasteful number, since it uses less digits than its factorization.

1321211100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6606055517 (or 6606055508 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 1321211100200 its reverse (20011121231), we get a palindrome (1341222221431).

It can be divided in two parts, 132121 and 1100200, that added together give a palindrome (1232321).

The spelling of 1321211100200 in words is "one trillion, three hundred twenty-one billion, two hundred eleven million, one hundred thousand, two hundred".