20121022110021 has 8 divisors (see below), whose sum is σ = 30660605120064. Its totient is φ = 11497726920000.

The previous prime is 20121022110017. The next prime is 20121022110073. The reversal of 20121022110021 is 12001122012102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20121022110021 - 2² = 20121022110017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121022110001) 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, 479071954980 + ... + 479071955021.

It is an arithmetic number, because the mean of its divisors is an integer number (3832575640008).

Almost surely, 2^{20121022110021} is an apocalyptic number.

20121022110021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20121022110021 is a deficient number, since it is larger than the sum of its proper divisors (10539583010043).

20121022110021 is an equidigital number, since it uses as much as digits as its factorization.

20121022110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958143910011.

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

Adding to 20121022110021 its reverse (12001122012102), we get a palindrome (32122144122123).

The spelling of 20121022110021 in words is "twenty trillion, one hundred twenty-one billion, twenty-two million, one hundred ten thousand, twenty-one".