220000010120021 has 2 divisors, whose sum is σ = 220000010120022. Its totient is φ = 220000010120020.

The previous prime is 220000010119997. The next prime is 220000010120027. The reversal of 220000010120021 is 120021010000022.

It is a happy number.

220000010120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208238464420900 + 11761545699121 = 14430470^2 + 3429511^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000010120021 - 2²⁶ = 219999943011157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220000010119984 and 220000010120011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220000010120027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000005060010 + 110000005060011.

It is an arithmetic number, because the mean of its divisors is an integer number (110000005060011).

Almost surely, 2^{220000010120021} is an apocalyptic number.

It is an amenable number.

220000010120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000010120021 is an equidigital number, since it uses as much as digits as its factorization.

220000010120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 220000010120021 its reverse (120021010000022), we get a palindrome (340021020120043).

The spelling of 220000010120021 in words is "two hundred twenty trillion, ten million, one hundred twenty thousand, twenty-one".