20113211020031 has 4 divisors (see below), whose sum is σ = 20116320195000. Its totient is φ = 20110101845064.

The previous prime is 20113211019971. The next prime is 20113211020033. The reversal of 20113211020031 is 13002011231102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20113211020031 is a prime.

It is a super-3 number, since 3×20113211020031³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113211019991 and 20113211020009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113211020033) 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, 1554577781 + ... + 1554590718.

It is an arithmetic number, because the mean of its divisors is an integer number (5029080048750).

Almost surely, 2^{20113211020031} is an apocalyptic number.

20113211020031 is a deficient number, since it is larger than the sum of its proper divisors (3109174969).

20113211020031 is an equidigital number, since it uses as much as digits as its factorization.

20113211020031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109174968.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 20113211020031 its reverse (13002011231102), we get a palindrome (33115222251133).

The spelling of 20113211020031 in words is "twenty trillion, one hundred thirteen billion, two hundred eleven million, twenty thousand, thirty-one".