220121021000989 has 2 divisors, whose sum is σ = 220121021000990. Its totient is φ = 220121021000988.

The previous prime is 220121021000977. The next prime is 220121021001019. The reversal of 220121021000989 is 989000120121022.

220121021000989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153328535108100 + 66792485892889 = 12382590^2 + 8172667^2 .

It is a cyclic number.

It is not a de Polignac number, because 220121021000989 - 2¹⁵ = 220121020968221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220121021000939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110060510500494 + 110060510500495.

It is an arithmetic number, because the mean of its divisors is an integer number (110060510500495).

Almost surely, 2^{220121021000989} is an apocalyptic number.

It is an amenable number.

220121021000989 is a deficient number, since it is larger than the sum of its proper divisors (1).

220121021000989 is an equidigital number, since it uses as much as digits as its factorization.

220121021000989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 220121021000989 in words is "two hundred twenty trillion, one hundred twenty-one billion, twenty-one million, nine hundred eighty-nine", and thus it is an aban number.