1212001212 has 36 divisors (see below), whose sum is σ = 2856568568. Its totient is φ = 399960000.

The previous prime is 1212001211. The next prime is 1212001223. The reversal of 1212001212 is 2121002121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212001211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117462 + ... + 127362.

Almost surely, 2^1212001212 is an apocalyptic number.

1212001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212001212 is an abundant number, since it is smaller than the sum of its proper divisors (1644567356).

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

1212001212 is a wasteful number, since it uses less digits than its factorization.

1212001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10110 (or 10007 counting only the distinct ones).

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

The square root of 1212001212 is about 34813.8077779493. The cubic root of 1212001212 is about 1066.1893776541.

1212001212 divided by its sum of digits (12) gives a palindrome (101000101).

Adding to 1212001212 its reverse (2121002121), we get a palindrome (3333003333).

Subtracting 1212001212 from its reverse (2121002121), we obtain a palindrome (909000909).

It can be divided in two parts, 121200 and 1212, that multiplied together give a square (146894400 = 12120²).

The spelling of 1212001212 in words is "one billion, two hundred twelve million, one thousand, two hundred twelve".