1231021330 has 96 divisors (see below), whose sum is σ = 2813045760. Its totient is φ = 379632000.

The previous prime is 1231021327. The next prime is 1231021361. The reversal of 1231021330 is 331201321.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 854751 + ... + 856189.

It is an arithmetic number, because the mean of its divisors is an integer number (29302560).

Almost surely, 2^1231021330 is an apocalyptic number.

1231021330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231021330 is an abundant number, since it is smaller than the sum of its proper divisors (1582024430).

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

1231021330 is a wasteful number, since it uses less digits than its factorization.

1231021330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231021330 is about 35085.9135551577. The cubic root of 1231021330 is about 1071.7377445876.

Adding to 1231021330 its reverse (331201321), we get a palindrome (1562222651).

Subtracting from 1231021330 its reverse (331201321), we obtain a square (899820009 = 29997²).

The spelling of 1231021330 in words is "one billion, two hundred thirty-one million, twenty-one thousand, three hundred thirty".