1211231200 has 36 divisors (see below), whose sum is σ = 2956920120. Its totient is φ = 484492160.

The previous prime is 1211231123. The next prime is 1211231213. The reversal of 1211231200 is 21321121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 756220 + ... + 757819.

It is an arithmetic number, because the mean of its divisors is an integer number (82136670).

Almost surely, 2^1211231200 is an apocalyptic number.

1211231200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1211231200 is an abundant number, since it is smaller than the sum of its proper divisors (1745688920).

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

1211231200 is a wasteful number, since it uses less digits than its factorization.

1211231200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514059 (or 1514046 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1211231200 is about 34802.7470180157. The cubic root of 1211231200 is about 1065.9635383479.

Adding to 1211231200 its reverse (21321121), we get a palindrome (1232552321).

It can be divided in two parts, 121 and 1231200, that added together give a palindrome (1231321).

The spelling of 1211231200 in words is "one billion, two hundred eleven million, two hundred thirty-one thousand, two hundred".