1101212121200 has 60 divisors (see below), whose sum is σ = 2801289322080. Its totient is φ = 414573972480.

The previous prime is 1101212121197. The next prime is 1101212121211. The reversal of 1101212121200 is 21212121011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80964680 + ... + 80978279.

It is an arithmetic number, because the mean of its divisors is an integer number (46688155368).

Almost surely, 2^{1101212121200} is an apocalyptic number.

1101212121200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101212121200 is an abundant number, since it is smaller than the sum of its proper divisors (1700077200880).

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

1101212121200 is a wasteful number, since it uses less digits than its factorization.

1101212121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161942994 (or 161942983 counting only the distinct ones).

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

Adding to 1101212121200 its reverse (21212121011), we get a palindrome (1122424242211).

The spelling of 1101212121200 in words is "one trillion, one hundred one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred".