1321101001 has 8 divisors (see below), whose sum is σ = 1451722464. Its totient is φ = 1192233120.

The previous prime is 1321100999. The next prime is 1321101007. The reversal of 1321101001 is 1001011231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321101001 - 2¹ = 1321100999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321101007) 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, 436815 + ... + 439828.

It is an arithmetic number, because the mean of its divisors is an integer number (181465308).

Almost surely, 2^1321101001 is an apocalyptic number.

1321101001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321101001 is a deficient number, since it is larger than the sum of its proper divisors (130621463).

1321101001 is a wasteful number, since it uses less digits than its factorization.

1321101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876791.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 1321101001 is about 36346.9531185215. The cubic root of 1321101001 is about 1097.2662144922.

Adding to 1321101001 its reverse (1001011231), we get a palindrome (2322112232).

The spelling of 1321101001 in words is "one billion, three hundred twenty-one million, one hundred one thousand, one".