1200001212 has 36 divisors (see below), whose sum is σ = 3051515376. Its totient is φ = 397603200.

The previous prime is 1200001193. The next prime is 1200001247. The reversal of 1200001212 is 2121000021.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (9).

1200001212 is a modest number, since divided by 1212 gives 12 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1200001194 and 1200001203.

It is a congruent number.

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, 93789 + ... + 105812.

It is an arithmetic number, because the mean of its divisors is an integer number (84764316).

Almost surely, 2^1200001212 is an apocalyptic number.

1200001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200001212 is an abundant number, since it is smaller than the sum of its proper divisors (1851514164).

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

1200001212 is a wasteful number, since it uses less digits than its factorization.

1200001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199778 (or 199773 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1200001212 is about 34641.0336450863. The cubic root of 1200001212 is about 1062.6589269442.

Adding to 1200001212 its reverse (2121000021), we get a palindrome (3321001233).

The spelling of 1200001212 in words is "one billion, two hundred million, one thousand, two hundred twelve".