1212002200 has 72 divisors (see below), whose sum is σ = 2856965580. Its totient is φ = 478171200.

The previous prime is 1212002149. The next prime is 1212002201. The reversal of 1212002200 is 22002121.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212002201) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1247715 + ... + 1248685.

Almost surely, 2^1212002200 is an apocalyptic number.

1212002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1212002200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428482790).

1212002200 is an abundant number, since it is smaller than the sum of its proper divisors (1644963380).

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

1212002200 is an equidigital number, since it uses as much as digits as its factorization.

1212002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1145 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 1212002200 is about 34813.8219677185. The cubic root of 1212002200 is about 1066.1896673663.

Adding to 1212002200 its reverse (22002121), we get a palindrome (1234004321).

The spelling of 1212002200 in words is "one billion, two hundred twelve million, two thousand, two hundred".