1210123320 has 64 divisors (see below), whose sum is σ = 4148997120. Its totient is φ = 276599424.

The previous prime is 1210123301. The next prime is 1210123331. The reversal of 1210123320 is 233210121.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1210123320.

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, 719472 + ... + 721151.

It is an arithmetic number, because the mean of its divisors is an integer number (64828080).

Almost surely, 2^1210123320 is an apocalyptic number.

1210123320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1210123320 is an abundant number, since it is smaller than the sum of its proper divisors (2938873800).

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

1210123320 is a wasteful number, since it uses less digits than its factorization.

1210123320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440644 (or 1440640 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1210123320 is about 34786.8268170582. The cubic root of 1210123320 is about 1065.6384366575.

Adding to 1210123320 its reverse (233210121), we get a palindrome (1443333441).

The spelling of 1210123320 in words is "one billion, two hundred ten million, one hundred twenty-three thousand, three hundred twenty".