1212001200 has 90 divisors (see below), whose sum is σ = 4205993324. Its totient is φ = 323199360.

The previous prime is 1212001177. The next prime is 1212001211. The reversal of 1212001200 is 21002121.

It is a tau number, because it is divible by the number of its divisors (90).

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 164734 + ... + 171933.

Almost surely, 2^1212001200 is an apocalyptic number.

1212001200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212001200 is an abundant number, since it is smaller than the sum of its proper divisors (2993992124).

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

1212001200 is a wasteful number, since it uses less digits than its factorization.

1212001200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336691 (or 336677 counting only the distinct ones).

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

The square root of 1212001200 is about 34813.8076056038. The cubic root of 1212001200 is about 1066.1893741353.

Adding to 1212001200 its reverse (21002121), we get a palindrome (1233003321).

It can be divided in two parts, 1212001 and 200, that added together give a square (1212201 = 1101²).

The spelling of 1212001200 in words is "one billion, two hundred twelve million, one thousand, two hundred".