102031320021 has 8 divisors (see below), whose sum is σ = 139359851904. Its totient is φ = 66361834080.

The previous prime is 102031320007. The next prime is 102031320037. The reversal of 102031320021 is 120023130201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102031320021 - 2⁷ = 102031319893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102031120021) 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 in 7 ways as a sum of consecutive naturals, for example, 414761341 + ... + 414761586.

It is an arithmetic number, because the mean of its divisors is an integer number (17419981488).

Almost surely, 2^102031320021 is an apocalyptic number.

It is an amenable number.

102031320021 is a deficient number, since it is larger than the sum of its proper divisors (37328531883).

102031320021 is an equidigital number, since it uses as much as digits as its factorization.

102031320021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829522971.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 102031320021 its reverse (120023130201), we get a palindrome (222054450222).

The spelling of 102031320021 in words is "one hundred two billion, thirty-one million, three hundred twenty thousand, twenty-one".