12021211120020 has 384 divisors, whose sum is σ = 35892325324800. Its totient is φ = 3000814387200.

The previous prime is 12021211120013. The next prime is 12021211120057. The reversal of 12021211120020 is 2002111212021.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 13707195822 + ... + 13707196698.

It is an arithmetic number, because the mean of its divisors is an integer number (93469597200).

Almost surely, 2^{12021211120020} is an apocalyptic number.

12021211120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12021211120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17946162662400).

12021211120020 is an abundant number, since it is smaller than the sum of its proper divisors (23871114204780).

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

12021211120020 is a wasteful number, since it uses less digits than its factorization.

12021211120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1939 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12021211120020 its reverse (2002111212021), we get a palindrome (14023322332041).

The spelling of 12021211120020 in words is "twelve trillion, twenty-one billion, two hundred eleven million, one hundred twenty thousand, twenty".