20331121221031 has 16 divisors (see below), whose sum is σ = 20955649464288. Its totient is φ = 19712729203200.

The previous prime is 20331121221001. The next prime is 20331121221041. The reversal of 20331121221031 is 13012212113302.

It is a cyclic number.

It is not a de Polignac number, because 20331121221031 - 2⁹ = 20331121220519 is a prime.

It is a super-2 number, since 2×20331121221031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20331121220993 and 20331121221011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331121221001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214323171 + ... + 214418011.

It is an arithmetic number, because the mean of its divisors is an integer number (1309728091518).

Almost surely, 2^{20331121221031} is an apocalyptic number.

20331121221031 is a deficient number, since it is larger than the sum of its proper divisors (624528243257).

20331121221031 is a wasteful number, since it uses less digits than its factorization.

20331121221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127122.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20331121221031 its reverse (13012212113302), we get a palindrome (33343333334333).

The spelling of 20331121221031 in words is "twenty trillion, three hundred thirty-one billion, one hundred twenty-one million, two hundred twenty-one thousand, thirty-one".