1212011001100 has 36 divisors (see below), whose sum is σ = 2634785831664. Its totient is φ = 483933993280.

The previous prime is 1212011001067. The next prime is 1212011001121. The reversal of 1212011001100 is 11001102121.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10824112 + ... + 10935511.

It is an arithmetic number, because the mean of its divisors is an integer number (73188495324).

Almost surely, 2^{1212011001100} is an apocalyptic number.

1212011001100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212011001100 is an abundant number, since it is smaller than the sum of its proper divisors (1422774830564).

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

1212011001100 is a wasteful number, since it uses less digits than its factorization.

1212011001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21760194 (or 21760187 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1212011001100 its reverse (11001102121), we get a palindrome (1223012103221).

The spelling of 1212011001100 in words is "one trillion, two hundred twelve billion, eleven million, one thousand, one hundred".