20101000031 has 8 divisors (see below), whose sum is σ = 23506817664. Its totient is φ = 16828743960.

The previous prime is 20100999913. The next prime is 20101000043. The reversal of 20101000031 is 13000010102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20101000031 is a prime.

It is a super-2 number, since 2×20101000031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100999982 and 20101000018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101000061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33390065 + ... + 33390666.

It is an arithmetic number, because the mean of its divisors is an integer number (2938352208).

Almost surely, 2^20101000031 is an apocalyptic number.

20101000031 is a deficient number, since it is larger than the sum of its proper divisors (3405817633).

20101000031 is an equidigital number, since it uses as much as digits as its factorization.

20101000031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66780781.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 20101000031 its reverse (13000010102), we get a palindrome (33101010133).

The spelling of 20101000031 in words is "twenty billion, one hundred one million, thirty-one", and thus it is an aban number.