1210012200 has 72 divisors (see below), whose sum is σ = 4063630350. Its totient is φ = 322669440.

The previous prime is 1210012187. The next prime is 1210012229. The reversal of 1210012200 is 22100121.

It can be written as a sum of positive squares in 3 ways, for example, as 1106094564 + 103917636 = 33258^2 + 10194^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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, 334315 + ... + 337914.

Almost surely, 2^1210012200 is an apocalyptic number.

1210012200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210012200 is an abundant number, since it is smaller than the sum of its proper divisors (2853618150).

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

1210012200 is a wasteful number, since it uses less digits than its factorization.

1210012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672251 (or 672239 counting only the distinct ones).

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

The square root of 1210012200 is about 34785.2296240804. The cubic root of 1210012200 is about 1065.6058181175.

Adding to 1210012200 its reverse (22100121), we get a palindrome (1232112321).

It can be divided in two parts, 121001 and 2200, that added together give a square (123201 = 351²).

The spelling of 1210012200 in words is "one billion, two hundred ten million, twelve thousand, two hundred".