13021311123020 has 96 divisors (see below), whose sum is σ = 29258960814720. Its totient is φ = 4858629027840.

The previous prime is 13021311122951. The next prime is 13021311123097. The reversal of 13021311123020 is 2032111312031.

It is a happy number.

It is a super-3 number, since 3×13021311123020³ (a number of 40 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 13021311122983 and 13021311123001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208787 + ... + 5107466.

It is an arithmetic number, because the mean of its divisors is an integer number (304780841820).

Almost surely, 2^{13021311123020} is an apocalyptic number.

13021311123020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13021311123020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14629480407360).

13021311123020 is an abundant number, since it is smaller than the sum of its proper divisors (16237649691700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13021311123020 is a wasteful number, since it uses less digits than its factorization.

13021311123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5316435 (or 5316433 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13021311123020 its reverse (2032111312031), we get a palindrome (15053422435051).

The spelling of 13021311123020 in words is "thirteen trillion, twenty-one billion, three hundred eleven million, one hundred twenty-three thousand, twenty".