102020310291 has 32 divisors (see below), whose sum is σ = 147769489728. Its totient is φ = 62354984960.

The previous prime is 102020310277. The next prime is 102020310299. The reversal of 102020310291 is 192013020201.

It is a cyclic number.

It is not a de Polignac number, because 102020310291 - 2²¹ = 102018213139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102020310299) 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 in 31 ways as a sum of consecutive naturals, for example, 1328065 + ... + 1402781.

It is an arithmetic number, because the mean of its divisors is an integer number (4617796554).

Almost surely, 2^102020310291 is an apocalyptic number.

102020310291 is a deficient number, since it is larger than the sum of its proper divisors (45749179437).

102020310291 is a wasteful number, since it uses less digits than its factorization.

102020310291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75431.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 102020310291 its reverse (192013020201), we get a palindrome (294033330492).

The spelling of 102020310291 in words is "one hundred two billion, twenty million, three hundred ten thousand, two hundred ninety-one".