1212012101200 has 60 divisors (see below), whose sum is σ = 2918344715100. Its totient is φ = 483725025280.

The previous prime is 1212012101173. The next prime is 1212012101213. The reversal of 1212012101200 is 21012102121.

It can be written as a sum of positive squares in 6 ways, for example, as 39538936336 + 1172473164864 = 198844^2 + 1082808^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3194599 + ... + 3553798.

It is an arithmetic number, because the mean of its divisors is an integer number (48639078585).

Almost surely, 2^{1212012101200} is an apocalyptic number.

1212012101200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212012101200 is an abundant number, since it is smaller than the sum of its proper divisors (1706332613900).

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

1212012101200 is a wasteful number, since it uses less digits than its factorization.

1212012101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6748864 (or 6748853 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212012101200 its reverse (21012102121), we get a palindrome (1233024203321).

The spelling of 1212012101200 in words is "one trillion, two hundred twelve billion, twelve million, one hundred one thousand, two hundred".