20001112221031 has 16 divisors (see below), whose sum is σ = 20512071917568. Its totient is φ = 19491266116800.

The previous prime is 20001112221019. The next prime is 20001112221049. The reversal of 20001112221031 is 13012221110002.

It is a cyclic number.

It is not a de Polignac number, because 20001112221031 - 2⁹ = 20001112220519 is a prime.

It is a super-2 number, since 2×20001112221031² (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 = 20001112220996 and 20001112221014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001112521031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133473310 + ... + 133623076.

It is an arithmetic number, because the mean of its divisors is an integer number (1282004494848).

Almost surely, 2^{20001112221031} is an apocalyptic number.

20001112221031 is a deficient number, since it is larger than the sum of its proper divisors (510959696537).

20001112221031 is a wasteful number, since it uses less digits than its factorization.

20001112221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153462.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20001112221031 its reverse (13012221110002), we get a palindrome (33013333331033).

The spelling of 20001112221031 in words is "twenty trillion, one billion, one hundred twelve million, two hundred twenty-one thousand, thirty-one".