122120211020989 has 2 divisors, whose sum is σ = 122120211020990. Its totient is φ = 122120211020988.

The previous prime is 122120211020963. The next prime is 122120211021049. The reversal of 122120211020989 is 989020112021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96989209856100 + 25131001164889 = 9848310^2 + 5013083^2 .

It is a cyclic number.

It is not a de Polignac number, because 122120211020989 - 2¹¹ = 122120211018941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122120211027989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060105510494 + 61060105510495.

It is an arithmetic number, because the mean of its divisors is an integer number (61060105510495).

Almost surely, 2^{122120211020989} is an apocalyptic number.

It is an amenable number.

122120211020989 is a deficient number, since it is larger than the sum of its proper divisors (1).

122120211020989 is an equidigital number, since it uses as much as digits as its factorization.

122120211020989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 122120211020989 in words is "one hundred twenty-two trillion, one hundred twenty billion, two hundred eleven million, twenty thousand, nine hundred eighty-nine".