102020209231 has 2 divisors, whose sum is σ = 102020209232. Its totient is φ = 102020209230.

The previous prime is 102020209223. The next prime is 102020209241. The reversal of 102020209231 is 132902020201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102020209231 - 2³ = 102020209223 is a prime.

It is a super-2 number, since 2×102020209231² (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 (102020209241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010104615 + 51010104616.

It is an arithmetic number, because the mean of its divisors is an integer number (51010104616).

Almost surely, 2^102020209231 is an apocalyptic number.

102020209231 is a deficient number, since it is larger than the sum of its proper divisors (1).

102020209231 is an equidigital number, since it uses as much as digits as its factorization.

102020209231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 102020209231 its reverse (132902020201), we get a palindrome (234922229432).

The spelling of 102020209231 in words is "one hundred two billion, twenty million, two hundred nine thousand, two hundred thirty-one".