1212212001100 has 36 divisors (see below), whose sum is σ = 2785235342904. Its totient is φ = 456362164480.

The previous prime is 1212212001089. The next prime is 1212212001101. The reversal of 1212212001100 is 11002122121.

It is a super-3 number, since 3×1212212001100³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1212212001101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356531242 + ... + 356534641.

It is an arithmetic number, because the mean of its divisors is an integer number (77367648414).

Almost surely, 2^{1212212001100} is an apocalyptic number.

1212212001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212212001100 is an abundant number, since it is smaller than the sum of its proper divisors (1573023341804).

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

1212212001100 is a wasteful number, since it uses less digits than its factorization.

1212212001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713065914 (or 713065907 counting only the distinct ones).

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

Adding to 1212212001100 its reverse (11002122121), we get a palindrome (1223214123221).

The spelling of 1212212001100 in words is "one trillion, two hundred twelve billion, two hundred twelve million, one thousand, one hundred".