1200211100 has 54 divisors (see below), whose sum is σ = 2862780312. Its totient is φ = 436436000.

The previous prime is 1200211079. The next prime is 1200211183. The reversal of 1200211100 is 11120021.

1200211100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 37496 + ... + 61695.

Almost surely, 2^1200211100 is an apocalyptic number.

1200211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200211100 is an abundant number, since it is smaller than the sum of its proper divisors (1662569212).

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

1200211100 is a wasteful number, since it uses less digits than its factorization.

1200211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99227 (or 99209 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1200211100 is about 34644.0629834320. The cubic root of 1200211100 is about 1062.7208786468.

Adding to 1200211100 its reverse (11120021), we get a palindrome (1211331121).

It can be divided in two parts, 120021 and 1100, that added together give a palindrome (121121).

The spelling of 1200211100 in words is "one billion, two hundred million, two hundred eleven thousand, one hundred".