20121303331031 has 32 divisors (see below), whose sum is σ = 24240075509760. Its totient is φ = 16339508697600.

The previous prime is 20121303331027. The next prime is 20121303331097. The reversal of 20121303331031 is 13013330312102.

It is a cyclic number.

It is not a de Polignac number, because 20121303331031 - 2² = 20121303331027 is a prime.

It is a super-2 number, since 2×20121303331031² (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 = 20121303330988 and 20121303331006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121303331231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 175076 + ... + 6346121.

It is an arithmetic number, because the mean of its divisors is an integer number (757502359680).

Almost surely, 2^{20121303331031} is an apocalyptic number.

20121303331031 is a deficient number, since it is larger than the sum of its proper divisors (4118772178729).

20121303331031 is a wasteful number, since it uses less digits than its factorization.

20121303331031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6521535.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 20121303331031 its reverse (13013330312102), we get a palindrome (33134633643133).

The spelling of 20121303331031 in words is "twenty trillion, one hundred twenty-one billion, three hundred three million, three hundred thirty-one thousand, thirty-one".