1212201000012 has 24 divisors (see below), whose sum is σ = 2828548060912. Its totient is φ = 404055705600.

The previous prime is 1212200999987. The next prime is 1212201000029. The reversal of 1212201000012 is 2100001022121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 958789 + ... + 1828572.

Almost surely, 2^{1212201000012} is an apocalyptic number.

1212201000012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212201000012 is an abundant number, since it is smaller than the sum of its proper divisors (1616347060900).

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

1212201000012 is a wasteful number, since it uses less digits than its factorization.

1212201000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823609 (or 2823607 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Subtracting from 1212201000012 its sum of digits (12), we obtain a square (1212201000000 = 1101000²).

Adding to 1212201000012 its reverse (2100001022121), we get a palindrome (3312202022133).

The spelling of 1212201000012 in words is "one trillion, two hundred twelve billion, two hundred one million, twelve", and thus it is an aban number.