1210321140 has 48 divisors (see below), whose sum is σ = 3873028992. Its totient is φ = 276644736.

The previous prime is 1210321139. The next prime is 1210321153. The reversal of 1210321140 is 411230121.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1440439 + ... + 1441278.

It is an arithmetic number, because the mean of its divisors is an integer number (80688104).

Almost surely, 2^1210321140 is an apocalyptic number.

1210321140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210321140 is an abundant number, since it is smaller than the sum of its proper divisors (2662707852).

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

1210321140 is a wasteful number, since it uses less digits than its factorization.

1210321140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2881736 (or 2881734 counting only the distinct ones).

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

The square root of 1210321140 is about 34789.6700185558. The cubic root of 1210321140 is about 1065.6965004670.

Adding to 1210321140 its reverse (411230121), we get a palindrome (1621551261).

The spelling of 1210321140 in words is "one billion, two hundred ten million, three hundred twenty-one thousand, one hundred forty".