21112210202020 has 24 divisors (see below), whose sum is σ = 50669304485184. Its totient is φ = 7238472069216.

The previous prime is 21112210201997. The next prime is 21112210202023. The reversal of 21112210202020 is 2020201221112.

It is a happy number.

It is a super-2 number, since 2×21112210202020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112210201985 and 21112210202003.

It is not an unprimeable number, because it can be changed into a prime (21112210202023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75400750582 + ... + 75400750861.

It is an arithmetic number, because the mean of its divisors is an integer number (2111221020216).

Almost surely, 2^{21112210202020} is an apocalyptic number.

21112210202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112210202020 is an abundant number, since it is smaller than the sum of its proper divisors (29557094283164).

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

21112210202020 is a wasteful number, since it uses less digits than its factorization.

21112210202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150801501459 (or 150801501457 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21112210202020 its reverse (2020201221112), we get a palindrome (23132411423132).

The spelling of 21112210202020 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred two thousand, twenty".