1212111120200 has 96 divisors (see below), whose sum is σ = 2851676577000. Its totient is φ = 479096832000.

The previous prime is 1212111120163. The next prime is 1212111120203. The reversal of 1212111120200 is 20211112121.

It can be written as a sum of positive squares in 12 ways, for example, as 383971079716 + 828140040484 = 619654^2 + 910022^2 .

It is not an unprimeable number, because it can be changed into a prime (1212111120203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10222856 + ... + 10340744.

Almost surely, 2^{1212111120200} is an apocalyptic number.

1212111120200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212111120200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1425838288500).

1212111120200 is an abundant number, since it is smaller than the sum of its proper divisors (1639565456800).

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

1212111120200 is a wasteful number, since it uses less digits than its factorization.

1212111120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118515 (or 118506 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1212111120200 its reverse (20211112121), we get a palindrome (1232322232321).

The spelling of 1212111120200 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty thousand, two hundred".