1320923101 has 4 divisors (see below), whose sum is σ = 1339018012. Its totient is φ = 1302828192.

The previous prime is 1320923057. The next prime is 1320923119. The reversal of 1320923101 is 1013290231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 282408025 + 1038515076 = 16805^2 + 32226^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320923101 - 2⁷ = 1320922973 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 (1320923141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9047346 + ... + 9047491.

It is an arithmetic number, because the mean of its divisors is an integer number (334754503).

Almost surely, 2^1320923101 is an apocalyptic number.

It is an amenable number.

1320923101 is a deficient number, since it is larger than the sum of its proper divisors (18094911).

1320923101 is an equidigital number, since it uses as much as digits as its factorization.

1320923101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18094910.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1320923101 is about 36344.5057883582. The cubic root of 1320923101 is about 1097.2169595091.

The spelling of 1320923101 in words is "one billion, three hundred twenty million, nine hundred twenty-three thousand, one hundred one".