989634226121 has 2 divisors, whose sum is σ = 989634226122. Its totient is φ = 989634226120.

The previous prime is 989634226093. The next prime is 989634226201. The reversal of 989634226121 is 121622436989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962164810000 + 27469416121 = 980900^2 + 165739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989634226121 is a prime.

It is a super-2 number, since 2×989634226121² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (989634220121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494817113060 + 494817113061.

It is an arithmetic number, because the mean of its divisors is an integer number (494817113061).

Almost surely, 2^989634226121 is an apocalyptic number.

It is an amenable number.

989634226121 is a deficient number, since it is larger than the sum of its proper divisors (1).

989634226121 is an equidigital number, since it uses as much as digits as its factorization.

989634226121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The spelling of 989634226121 in words is "nine hundred eighty-nine billion, six hundred thirty-four million, two hundred twenty-six thousand, one hundred twenty-one".