220221020211989 has 2 divisors, whose sum is σ = 220221020211990. Its totient is φ = 220221020211988.

The previous prime is 220221020211967. The next prime is 220221020212003. The reversal of 220221020211989 is 989112020122022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185608389649489 + 34612630562500 = 13623817^2 + 5883250^2 .

It is a cyclic number.

It is not a de Polignac number, because 220221020211989 - 2⁸ = 220221020211733 is a prime.

It is a super-2 number, since 2×220221020211989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220221023211989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110110510105994 + 110110510105995.

It is an arithmetic number, because the mean of its divisors is an integer number (110110510105995).

Almost surely, 2^{220221020211989} is an apocalyptic number.

It is an amenable number.

220221020211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220221020211989 is an equidigital number, since it uses as much as digits as its factorization.

220221020211989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 220221020211989 in words is "two hundred twenty trillion, two hundred twenty-one billion, twenty million, two hundred eleven thousand, nine hundred eighty-nine".