1231002200 has 48 divisors (see below), whose sum is σ = 2864400000. Its totient is φ = 492001920.

The previous prime is 1231002169. The next prime is 1231002203. The reversal of 1231002200 is 22001321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231002203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 446426 + ... + 449174.

It is an arithmetic number, because the mean of its divisors is an integer number (59675000).

Almost surely, 2^1231002200 is an apocalyptic number.

1231002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231002200 is an abundant number, since it is smaller than the sum of its proper divisors (1633397800).

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

1231002200 is a wasteful number, since it uses less digits than its factorization.

1231002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004 (or 4995 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1231002200 is about 35085.6409375687. The cubic root of 1231002200 is about 1071.7321929780.

Adding to 1231002200 its reverse (22001321), we get a palindrome (1253003521).

The spelling of 1231002200 in words is "one billion, two hundred thirty-one million, two thousand, two hundred".