1231102000 has 80 divisors (see below), whose sum is σ = 3025904544. Its totient is φ = 484320000.

The previous prime is 1231101983. The next prime is 1231102001. The reversal of 1231102000 is 2011321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1231102000² = 3031224268808000000, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231102001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116955 + ... + 127045.

Almost surely, 2^1231102000 is an apocalyptic number.

1231102000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231102000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1512952272).

1231102000 is an abundant number, since it is smaller than the sum of its proper divisors (1794802544).

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

1231102000 is a wasteful number, since it uses less digits than its factorization.

1231102000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10175 (or 10159 counting only the distinct ones).

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

The square root of 1231102000 is about 35087.0631429876. The cubic root of 1231102000 is about 1071.7611547412.

Adding to 1231102000 its reverse (2011321), we get a palindrome (1233113321).

The spelling of 1231102000 in words is "one billion, two hundred thirty-one million, one hundred two thousand".