20011012210331 has 4 divisors (see below), whose sum is σ = 20049421063464. Its totient is φ = 19972603357200.

The previous prime is 20011012210313. The next prime is 20011012210333. The reversal of 20011012210331 is 13301221011002.

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-20011012210331 is a prime.

It is a super-2 number, since 2×20011012210331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20011012210333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19204425785 + ... + 19204426826.

It is an arithmetic number, because the mean of its divisors is an integer number (5012355265866).

Almost surely, 2^{20011012210331} is an apocalyptic number.

20011012210331 is a deficient number, since it is larger than the sum of its proper divisors (38408853133).

20011012210331 is an equidigital number, since it uses as much as digits as its factorization.

20011012210331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38408853132.

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

Adding to 20011012210331 its reverse (13301221011002), we get a palindrome (33312233221333).

The spelling of 20011012210331 in words is "twenty trillion, eleven billion, twelve million, two hundred ten thousand, three hundred thirty-one".