20121222211021 has 8 divisors (see below), whose sum is σ = 20230421552064. Its totient is φ = 20012203217760.

The previous prime is 20121222211009. The next prime is 20121222211039. The reversal of 20121222211021 is 12011222212102.

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

It is a cyclic number.

It is not a de Polignac number, because 20121222211021 - 2⁵ = 20121222210989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121222211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121222215021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44863200 + ... + 45309481.

It is an arithmetic number, because the mean of its divisors is an integer number (2528802694008).

Almost surely, 2^{20121222211021} is an apocalyptic number.

It is an amenable number.

20121222211021 is a deficient number, since it is larger than the sum of its proper divisors (109199341043).

20121222211021 is an equidigital number, since it uses as much as digits as its factorization.

20121222211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90173891.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20121222211021 its reverse (12011222212102), we get a palindrome (32132444423123).

The spelling of 20121222211021 in words is "twenty trillion, one hundred twenty-one billion, two hundred twenty-two million, two hundred eleven thousand, twenty-one".