12021202120020 has 96 divisors (see below), whose sum is σ = 35785511500032. Its totient is φ = 3008423328768.

The previous prime is 12021202120013. The next prime is 12021202120051. The reversal of 12021202120020 is 2002120212021.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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, 82106257 + ... + 82252536.

It is an arithmetic number, because the mean of its divisors is an integer number (372765744792).

Almost surely, 2^{12021202120020} is an apocalyptic number.

12021202120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12021202120020 is an abundant number, since it is smaller than the sum of its proper divisors (23764309380012).

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

12021202120020 is a wasteful number, since it uses less digits than its factorization.

12021202120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164358881 (or 164358879 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12021202120020 its reverse (2002120212021), we get a palindrome (14023322332041).

The spelling of 12021202120020 in words is "twelve trillion, twenty-one billion, two hundred two million, one hundred twenty thousand, twenty".