20011001212031 has 2 divisors, whose sum is σ = 20011001212032. Its totient is φ = 20011001212030.

The previous prime is 20011001212009. The next prime is 20011001212199. The reversal of 20011001212031 is 13021210011002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20011001212031 is a prime.

It is a super-2 number, since 2×20011001212031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20011001211997 and 20011001212015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011001214031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005500606015 + 10005500606016.

It is an arithmetic number, because the mean of its divisors is an integer number (10005500606016).

Almost surely, 2^{20011001212031} is an apocalyptic number.

20011001212031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011001212031 is an equidigital number, since it uses as much as digits as its factorization.

20011001212031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20011001212031 its reverse (13021210011002), we get a palindrome (33032211223033).

The spelling of 20011001212031 in words is "twenty trillion, eleven billion, one million, two hundred twelve thousand, thirty-one".