220220202021121 has 2 divisors, whose sum is σ = 220220202021122. Its totient is φ = 220220202021120.

The previous prime is 220220202021119. The next prime is 220220202021227. The reversal of 220220202021121 is 121120202022022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219556498518721 + 663703502400 = 14817439^2 + 814680^2 .

It is a cyclic number.

It is not a de Polignac number, because 220220202021121 - 2¹ = 220220202021119 is a prime.

Together with 220220202021119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (220220202025121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110101010560 + 110110101010561.

It is an arithmetic number, because the mean of its divisors is an integer number (110110101010561).

Almost surely, 2^{220220202021121} is an apocalyptic number.

It is an amenable number.

220220202021121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220220202021121 is an equidigital number, since it uses as much as digits as its factorization.

220220202021121 is an evil number, because the sum of its binary digits is even.

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

Adding to 220220202021121 its reverse (121120202022022), we get a palindrome (341340404043143).

Subtracting from 220220202021121 its reverse (121120202022022), we obtain a palindrome (99099999999099).

The spelling of 220220202021121 in words is "two hundred twenty trillion, two hundred twenty billion, two hundred two million, twenty-one thousand, one hundred twenty-one".