12211121021020 has 48 divisors (see below), whose sum is σ = 26095485469536. Its totient is φ = 4798523232000.

The previous prime is 12211121021017. The next prime is 12211121021023. The reversal of 12211121021020 is 2012012111221.

It is an interprime number because it is at equal distance from previous prime (12211121021017) and next prime (12211121021023).

It is a super-2 number, since 2×12211121021020² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211121020985 and 12211121021003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211121021023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5094066 + ... + 7097305.

It is an arithmetic number, because the mean of its divisors is an integer number (543655947282).

Almost surely, 2^{12211121021020} is an apocalyptic number.

12211121021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12211121021020 is an abundant number, since it is smaller than the sum of its proper divisors (13884364448516).

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

12211121021020 is a wasteful number, since it uses less digits than its factorization.

12211121021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12192262 (or 12192260 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12211121021020 its reverse (2012012111221), we get a palindrome (14223133132241).

The spelling of 12211121021020 in words is "twelve trillion, two hundred eleven billion, one hundred twenty-one million, twenty-one thousand, twenty".