220212220120021 has 2 divisors, whose sum is σ = 220212220120022. Its totient is φ = 220212220120020.

The previous prime is 220212220120007. The next prime is 220212220120049. The reversal of 220212220120021 is 120021022212022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194372393062500 + 25839827057521 = 13941750^2 + 5083289^2 .

It is a cyclic number.

It is not a de Polignac number, because 220212220120021 - 2¹¹ = 220212220117973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220212220127021) 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 as a sum of consecutive naturals, namely, 110106110060010 + 110106110060011.

It is an arithmetic number, because the mean of its divisors is an integer number (110106110060011).

Almost surely, 2^{220212220120021} is an apocalyptic number.

It is an amenable number.

220212220120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220212220120021 is an equidigital number, since it uses as much as digits as its factorization.

220212220120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 220212220120021 its reverse (120021022212022), we get a palindrome (340233242332043).

The spelling of 220212220120021 in words is "two hundred twenty trillion, two hundred twelve billion, two hundred twenty million, one hundred twenty thousand, twenty-one".