21112331012020 has 48 divisors (see below), whose sum is σ = 45368428488768. Its totient is φ = 8248272076800.

The previous prime is 21112331011987. The next prime is 21112331012023. The reversal of 21112331012020 is 2021013321112.

It is a super-2 number, since 2×21112331012020² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112331012023) 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, 27360495 + ... + 28121545.

It is an arithmetic number, because the mean of its divisors is an integer number (945175593516).

Almost surely, 2^{21112331012020} is an apocalyptic number.

21112331012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112331012020 is an abundant number, since it is smaller than the sum of its proper divisors (24256097476748).

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

21112331012020 is a wasteful number, since it uses less digits than its factorization.

21112331012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793360 (or 793358 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21112331012020 its reverse (2021013321112), we get a palindrome (23133344333132).

The spelling of 21112331012020 in words is "twenty-one trillion, one hundred twelve billion, three hundred thirty-one million, twelve thousand, twenty".