102005001031 has 4 divisors (see below), whose sum is σ = 102307686832. Its totient is φ = 101702315232.

The previous prime is 102005000957. The next prime is 102005001067. The reversal of 102005001031 is 130100500201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102005001031 - 2²¹ = 102002903879 is a prime.

It is a super-2 number, since 2×102005001031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102005002031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151342395 + ... + 151343068.

It is an arithmetic number, because the mean of its divisors is an integer number (25576921708).

Almost surely, 2^102005001031 is an apocalyptic number.

102005001031 is a deficient number, since it is larger than the sum of its proper divisors (302685801).

102005001031 is an equidigital number, since it uses as much as digits as its factorization.

102005001031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302685800.

The product of its (nonzero) digits is 30, while the sum is 13.

Adding to 102005001031 its reverse (130100500201), we get a palindrome (232105501232).

The spelling of 102005001031 in words is "one hundred two billion, five million, one thousand, thirty-one".