1001211320 has 16 divisors (see below), whose sum is σ = 2252725560. Its totient is φ = 400484512.

The previous prime is 1001211313. The next prime is 1001211347. The reversal of 1001211320 is 231121001.

It is a super-2 number, since 2×1001211320² = 2004848214592284800, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 12515102 + ... + 12515181.

Almost surely, 2^1001211320 is an apocalyptic number.

1001211320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001211320 is an abundant number, since it is smaller than the sum of its proper divisors (1251514240).

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

1001211320 is a wasteful number, since it uses less digits than its factorization.

1001211320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25030294 (or 25030290 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1001211320 is about 31641.9234560733. The cubic root of 1001211320 is about 1000.4036104101.

Adding to 1001211320 its reverse (231121001), we get a palindrome (1232332321).

The spelling of 1001211320 in words is "one billion, one million, two hundred eleven thousand, three hundred twenty".