1320021101 has 32 divisors (see below), whose sum is σ = 1596672000. Its totient is φ = 1067435712.

The previous prime is 1320021097. The next prime is 1320021149. The reversal of 1320021101 is 1011200231.

It is not a de Polignac number, because 1320021101 - 2² = 1320021097 is a prime.

It is a super-3 number, since 3×1320021101³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320021161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3676760 + ... + 3677118.

It is an arithmetic number, because the mean of its divisors is an integer number (49896000).

Almost surely, 2^1320021101 is an apocalyptic number.

It is an amenable number.

1320021101 is a deficient number, since it is larger than the sum of its proper divisors (276650899).

1320021101 is a wasteful number, since it uses less digits than its factorization.

1320021101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761.

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

The square root of 1320021101 is about 36332.0946409645. The cubic root of 1320021101 is about 1096.9671556525.

Adding to 1320021101 its reverse (1011200231), we get a palindrome (2331221332).

The spelling of 1320021101 in words is "one billion, three hundred twenty million, twenty-one thousand, one hundred one".