1212011200100 has 18 divisors (see below), whose sum is σ = 2630064304434. Its totient is φ = 484804480000.

The previous prime is 1212011200091. The next prime is 1212011200117. The reversal of 1212011200100 is 10021102121.

It can be written as a sum of positive squares in 3 ways, for example, as 56403400036 + 1155607800064 = 237494^2 + 1074992^2 .

It is a super-2 number, since 2×1212011200100² (a number of 25 digits) contains 22 as substring.

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, 6060055901 + ... + 6060056100.

Almost surely, 2^{1212011200100} is an apocalyptic number.

1212011200100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212011200100 is an abundant number, since it is smaller than the sum of its proper divisors (1418053104334).

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

1212011200100 is a wasteful number, since it uses less digits than its factorization.

1212011200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12120112015 (or 12120112008 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1212011200100 its reverse (10021102121), we get a palindrome (1222032302221).

The spelling of 1212011200100 in words is "one trillion, two hundred twelve billion, eleven million, two hundred thousand, one hundred".