20101131120031 has 8 divisors (see below), whose sum is σ = 21647588738720. Its totient is φ = 18554704467552.

The previous prime is 20101131119963. The next prime is 20101131120043. The reversal of 20101131120031 is 13002113110102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20101131120031 - 2³¹ = 20098983636383 is a prime.

It is a super-2 number, since 2×20101131120031² (a number of 27 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 = 20101131119987 and 20101131120014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101131520031) 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, 6384540 + ... + 8998033.

It is an arithmetic number, because the mean of its divisors is an integer number (2705948592340).

Almost surely, 2^{20101131120031} is an apocalyptic number.

20101131120031 is a deficient number, since it is larger than the sum of its proper divisors (1546457618689).

20101131120031 is a wasteful number, since it uses less digits than its factorization.

20101131120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15483105.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 20101131120031 its reverse (13002113110102), we get a palindrome (33103244230133).

The spelling of 20101131120031 in words is "twenty trillion, one hundred one billion, one hundred thirty-one million, one hundred twenty thousand, thirty-one".