1031212140 has 96 divisors (see below), whose sum is σ = 3305487360. Its totient is φ = 235305216.

The previous prime is 1031212139. The next prime is 1031212177. The reversal of 1031212140 is 412121301.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296049 + ... + 299511.

It is an arithmetic number, because the mean of its divisors is an integer number (34432160).

Almost surely, 2^1031212140 is an apocalyptic number.

1031212140 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 1031212140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1652743680).

1031212140 is an abundant number, since it is smaller than the sum of its proper divisors (2274275220).

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

1031212140 is a wasteful number, since it uses less digits than its factorization.

1031212140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191 (or 4189 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1031212140 is about 32112.4919618519. The cubic root of 1031212140 is about 1010.2976412590.

Adding to 1031212140 its reverse (412121301), we get a palindrome (1443333441).

The spelling of 1031212140 in words is "one billion, thirty-one million, two hundred twelve thousand, one hundred forty".