101020193009 has 2 divisors, whose sum is σ = 101020193010. Its totient is φ = 101020193008.

The previous prime is 101020193003. The next prime is 101020193041. The reversal of 101020193009 is 900391020101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99053713984 + 1966479025 = 314728^2 + 44345^2 .

It is a cyclic number.

It is not a de Polignac number, because 101020193009 - 2⁸ = 101020192753 is a prime.

It is a super-2 number, since 2×101020193009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101020193003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50510096504 + 50510096505.

It is an arithmetic number, because the mean of its divisors is an integer number (50510096505).

Almost surely, 2^101020193009 is an apocalyptic number.

It is an amenable number.

101020193009 is a deficient number, since it is larger than the sum of its proper divisors (1).

101020193009 is an equidigital number, since it uses as much as digits as its factorization.

101020193009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

The spelling of 101020193009 in words is "one hundred one billion, twenty million, one hundred ninety-three thousand, nine".