101012321989 has 2 divisors, whose sum is σ = 101012321990. Its totient is φ = 101012321988.

The previous prime is 101012321957. The next prime is 101012322029. The reversal of 101012321989 is 989123210101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72047685889 + 28964636100 = 268417^2 + 170190^2 .

It is a cyclic number.

It is not a de Polignac number, because 101012321989 - 2⁵ = 101012321957 is a prime.

It is a super-2 number, since 2×101012321989² (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 (101012321939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50506160994 + 50506160995.

It is an arithmetic number, because the mean of its divisors is an integer number (50506160995).

Almost surely, 2^101012321989 is an apocalyptic number.

It is an amenable number.

101012321989 is a deficient number, since it is larger than the sum of its proper divisors (1).

101012321989 is an equidigital number, since it uses as much as digits as its factorization.

101012321989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 37.

The spelling of 101012321989 in words is "one hundred one billion, twelve million, three hundred twenty-one thousand, nine hundred eighty-nine".