20021212021120 has 64 divisors (see below), whose sum is σ = 47865644072640. Its totient is φ = 8008077537280.

The previous prime is 20021212021099. The next prime is 20021212021121. The reversal of 20021212021120 is 2112021212002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 20021212021094 and 20021212021103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021212021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11958825 + ... + 13529815.

It is an arithmetic number, because the mean of its divisors is an integer number (747900688635).

Almost surely, 2^{20021212021120} is an apocalyptic number.

20021212021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20021212021120 is an abundant number, since it is smaller than the sum of its proper divisors (27844432051520).

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

20021212021120 is a wasteful number, since it uses less digits than its factorization.

20021212021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590923 (or 1590911 counting only the distinct ones).

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

Adding to 20021212021120 its reverse (2112021212002), we get a palindrome (22133233233122).

The spelling of 20021212021120 in words is "twenty trillion, twenty-one billion, two hundred twelve million, twenty-one thousand, one hundred twenty".