1200213100 has 36 divisors (see below), whose sum is σ = 2605966888. Its totient is φ = 479808000.

The previous prime is 1200213089. The next prime is 1200213127. The reversal of 1200213100 is 13120021.

It is a super-2 number, since 2×1200213100² = 2881022970823220000, which contains 22 as substring.

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

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, 334315 + ... + 337885.

Almost surely, 2^1200213100 is an apocalyptic number.

1200213100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200213100 is an abundant number, since it is smaller than the sum of its proper divisors (1405753788).

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

1200213100 is a wasteful number, since it uses less digits than its factorization.

1200213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6946 (or 6939 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1200213100 is about 34644.0918483946. The cubic root of 1200213100 is about 1062.7214689431.

Adding to 1200213100 its reverse (13120021), we get a palindrome (1213333121).

The spelling of 1200213100 in words is "one billion, two hundred million, two hundred thirteen thousand, one hundred".