220020312011021 has 2 divisors, whose sum is σ = 220020312011022. Its totient is φ = 220020312011020.

The previous prime is 220020312010973. The next prime is 220020312011023. The reversal of 220020312011021 is 120110213020022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126287901608521 + 93732410402500 = 11237789^2 + 9681550^2 .

It is a cyclic number.

It is not a de Polignac number, because 220020312011021 - 2⁶ = 220020312010957 is a prime.

Together with 220020312011023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220020312011023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110010156005510 + 110010156005511.

It is an arithmetic number, because the mean of its divisors is an integer number (110010156005511).

Almost surely, 2^{220020312011021} is an apocalyptic number.

It is an amenable number.

220020312011021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220020312011021 is an equidigital number, since it uses as much as digits as its factorization.

220020312011021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 220020312011021 its reverse (120110213020022), we get a palindrome (340130525031043).

The spelling of 220020312011021 in words is "two hundred twenty trillion, twenty billion, three hundred twelve million, eleven thousand, twenty-one".