1321322101 has 16 divisors (see below), whose sum is σ = 1505806848. Its totient is φ = 1147682800.

The previous prime is 1321322077. The next prime is 1321322137. The reversal of 1321322101 is 1012231231.

It is a de Polignac number, because none of the positive numbers 2^k-1321322101 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 (1321322801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273630 + ... + 278416.

It is an arithmetic number, because the mean of its divisors is an integer number (94112928).

Almost surely, 2^1321322101 is an apocalyptic number.

1321322101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321322101 is a deficient number, since it is larger than the sum of its proper divisors (184484747).

1321322101 is a wasteful number, since it uses less digits than its factorization.

1321322101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5912.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1321322101 is about 36349.9945116915. The cubic root of 1321322101 is about 1097.3274240507.

Adding to 1321322101 its reverse (1012231231), we get a palindrome (2333553332).

The spelling of 1321322101 in words is "one billion, three hundred twenty-one million, three hundred twenty-two thousand, one hundred one".