101021010989 has 2 divisors, whose sum is σ = 101021010990. Its totient is φ = 101021010988.

The previous prime is 101021010943. The next prime is 101021011027. The reversal of 101021010989 is 989010120101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97365841225 + 3655169764 = 312035^2 + 60458^2 .

It is a cyclic number.

It is not a de Polignac number, because 101021010989 - 2²⁴ = 101004233773 is a prime.

It is a super-2 number, since 2×101021010989² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101021010689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510505494 + 50510505495.

It is an arithmetic number, because the mean of its divisors is an integer number (50510505495).

Almost surely, 2^101021010989 is an apocalyptic number.

It is an amenable number.

101021010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101021010989 is an equidigital number, since it uses as much as digits as its factorization.

101021010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The spelling of 101021010989 in words is "one hundred one billion, twenty-one million, ten thousand, nine hundred eighty-nine".