20120331001 has 4 divisors (see below), whose sum is σ = 20120957812. Its totient is φ = 20119704192.

The previous prime is 20120330983. The next prime is 20120331013. The reversal of 20120331001 is 10013302102.

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 13567590400 + 6552740601 = 116480^2 + 80949^2 .

It is a cyclic number.

It is not a de Polignac number, because 20120331001 - 2⁵ = 20120330969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20120331601) 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, 262500 + ... + 330373.

It is an arithmetic number, because the mean of its divisors is an integer number (5030239453).

Almost surely, 2^20120331001 is an apocalyptic number.

It is an amenable number.

20120331001 is a deficient number, since it is larger than the sum of its proper divisors (626811).

20120331001 is an equidigital number, since it uses as much as digits as its factorization.

20120331001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626810.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20120331001 its reverse (10013302102), we get a palindrome (30133633103).

The spelling of 20120331001 in words is "twenty billion, one hundred twenty million, three hundred thirty-one thousand, one".