20201220030031 has 4 divisors (see below), whose sum is σ = 20897813824200. Its totient is φ = 19504626235864.

The previous prime is 20201220030001. The next prime is 20201220030067. The reversal of 20201220030031 is 13003002210202.

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

It is a cyclic number.

It is not a de Polignac number, because 20201220030031 - 2³¹ = 20199072546383 is a prime.

It is a super-2 number, since 2×20201220030031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20201220029987 and 20201220030014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201220030001) 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, 348296897041 + ... + 348296897098.

It is an arithmetic number, because the mean of its divisors is an integer number (5224453456050).

Almost surely, 2^{20201220030031} is an apocalyptic number.

20201220030031 is a deficient number, since it is larger than the sum of its proper divisors (696593794169).

20201220030031 is an equidigital number, since it uses as much as digits as its factorization.

20201220030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696593794168.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 20201220030031 its reverse (13003002210202), we get a palindrome (33204222240233).

The spelling of 20201220030031 in words is "twenty trillion, two hundred one billion, two hundred twenty million, thirty thousand, thirty-one".