20210031001 has 4 divisors (see below), whose sum is σ = 21398856372. Its totient is φ = 19021205632.

The previous prime is 20210030993. The next prime is 20210031007. The reversal of 20210031001 is 10013001202.

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 7978776976 + 12231254025 = 89324^2 + 110595^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210031001 - 2³ = 20210030993 is a prime.

It is a super-2 number, since 2×20210031001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210031007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594412660 + ... + 594412693.

It is an arithmetic number, because the mean of its divisors is an integer number (5349714093).

Almost surely, 2^20210031001 is an apocalyptic number.

It is an amenable number.

20210031001 is a deficient number, since it is larger than the sum of its proper divisors (1188825371).

20210031001 is a wasteful number, since it uses less digits than its factorization.

20210031001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188825370.

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 20210031001 its reverse (10013001202), we get a palindrome (30223032203).

The spelling of 20210031001 in words is "twenty billion, two hundred ten million, thirty-one thousand, one".