1321002101 has 8 divisors (see below), whose sum is σ = 1366310400. Its totient is φ = 1275862320.

The previous prime is 1321002077. The next prime is 1321002131. The reversal of 1321002101 is 1012001231.

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 1321002101 - 2¹⁴ = 1320985717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321002131) 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, 26081 + ... + 57638.

It is an arithmetic number, because the mean of its divisors is an integer number (170788800).

Almost surely, 2^1321002101 is an apocalyptic number.

It is an amenable number.

1321002101 is a deficient number, since it is larger than the sum of its proper divisors (45308299).

1321002101 is an equidigital number, since it uses as much as digits as its factorization.

1321002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84259.

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

The square root of 1321002101 is about 36345.5925938758. The cubic root of 1321002101 is about 1097.2388327006.

Adding to 1321002101 its reverse (1012001231), we get a palindrome (2333003332).

The spelling of 1321002101 in words is "one billion, three hundred twenty-one million, two thousand, one hundred one".