31033100020001 has 4 divisors (see below), whose sum is σ = 31871832453012. Its totient is φ = 30194367586992.

The previous prime is 31033100019907. The next prime is 31033100020007. The reversal of 31033100020001 is 10002000133013.

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 17964882250000 + 13068217770001 = 4238500^2 + 3614999^2 .

It is a cyclic number.

It is not a de Polignac number, because 31033100020001 - 2¹⁸ = 31033099757857 is a prime.

It is a super-3 number, since 3×31033100020001³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31033100020007) 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, 419366216450 + ... + 419366216523.

It is an arithmetic number, because the mean of its divisors is an integer number (7967958113253).

Almost surely, 2^{31033100020001} is an apocalyptic number.

It is an amenable number.

31033100020001 is a deficient number, since it is larger than the sum of its proper divisors (838732433011).

31033100020001 is an equidigital number, since it uses as much as digits as its factorization.

31033100020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838732433010.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 31033100020001 its reverse (10002000133013), we get a palindrome (41035100153014).

The spelling of 31033100020001 in words is "thirty-one trillion, thirty-three billion, one hundred million, twenty thousand, one".