220000012021 has 2 divisors, whose sum is σ = 220000012022. Its totient is φ = 220000012020.

The previous prime is 220000012003. The next prime is 220000012039. The reversal of 220000012021 is 120210000022.

It is a balanced prime because it is at equal distance from previous prime (220000012003) and next prime (220000012039).

It can be written as a sum of positive squares in only one way, i.e., 209410572996 + 10589439025 = 457614^2 + 102905^2 .

It is a cyclic number.

It is not a de Polignac number, because 220000012021 - 2¹³ = 220000003829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220000011989 and 220000012007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220000012121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110000006010 + 110000006011.

It is an arithmetic number, because the mean of its divisors is an integer number (110000006011).

Almost surely, 2^220000012021 is an apocalyptic number.

It is an amenable number.

220000012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

220000012021 is an equidigital number, since it uses as much as digits as its factorization.

220000012021 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 10.

Adding to 220000012021 its reverse (120210000022), we get a palindrome (340210012043).

The spelling of 220000012021 in words is "two hundred twenty billion, twelve thousand, twenty-one".