1331210020 has 24 divisors (see below), whose sum is σ = 3194904384. Its totient is φ = 456414816.

The previous prime is 1331210011. The next prime is 1331210021. The reversal of 1331210020 is 200121331.

It is not an unprimeable number, because it can be changed into a prime (1331210021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4754182 + ... + 4754461.

It is an arithmetic number, because the mean of its divisors is an integer number (133121016).

Almost surely, 2^1331210020 is an apocalyptic number.

1331210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331210020 is an abundant number, since it is smaller than the sum of its proper divisors (1863694364).

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

1331210020 is a wasteful number, since it uses less digits than its factorization.

1331210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9508659 (or 9508657 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1331210020 is about 36485.7509173102. The cubic root of 1331210020 is about 1100.0578537065.

Adding to 1331210020 its reverse (200121331), we get a palindrome (1531331351).

It can be divided in two parts, 13312 and 10020, that added together give a palindrome (23332).

The spelling of 1331210020 in words is "one billion, three hundred thirty-one million, two hundred ten thousand, twenty".