102312021 has 8 divisors (see below), whose sum is σ = 155904064. Its totient is φ = 58464000.

The previous prime is 102311999. The next prime is 102312043. The reversal of 102312021 is 120213201.

It is an interprime number because it is at equal distance from previous prime (102311999) and next prime (102312043).

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

It is not a de Polignac number, because 102312021 - 2¹¹ = 102309973 is a prime.

It is a super-2 number, since 2×102312021² = 20935499282208882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102311988 and 102312006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102312421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2435980 + ... + 2436021.

It is an arithmetic number, because the mean of its divisors is an integer number (19488008).

Almost surely, 2^102312021 is an apocalyptic number.

It is an amenable number.

102312021 is a deficient number, since it is larger than the sum of its proper divisors (53592043).

102312021 is an equidigital number, since it uses as much as digits as its factorization.

102312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872011.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102312021 is about 10114.9404842540. The cubic root of 102312021 is about 467.7088142254.

Adding to 102312021 its reverse (120213201), we get a palindrome (222525222).

The spelling of 102312021 in words is "one hundred two million, three hundred twelve thousand, twenty-one".