12212012221020 has 72 divisors (see below), whose sum is σ = 39222109849104. Its totient is φ = 3064975615488.

The previous prime is 12212012221009. The next prime is 12212012221033. The reversal of 12212012221020 is 2012221021221.

It is a happy number.

12212012221020 is a `hidden beast` number, since 1 + 221 + 201 + 2 + 221 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12212012220984 and 12212012221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1995423774 + ... + 1995429893.

It is an arithmetic number, because the mean of its divisors is an integer number (544751525682).

Almost surely, 2^{12212012221020} is an apocalyptic number.

12212012221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212012221020 is an abundant number, since it is smaller than the sum of its proper divisors (27010097628084).

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

12212012221020 is a wasteful number, since it uses less digits than its factorization.

12212012221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990853699 (or 3990853694 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12212012221020 its reverse (2012221021221), we get a palindrome (14224233242241).

The spelling of 12212012221020 in words is "twelve trillion, two hundred twelve billion, twelve million, two hundred twenty-one thousand, twenty".