102102221021 has 8 divisors (see below), whose sum is σ = 105295204800. Its totient is φ = 98957985280.

The previous prime is 102102221009. The next prime is 102102221041. The reversal of 102102221021 is 120122201201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102102221021 is a prime.

It is a super-2 number, since 2×102102221021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102102220987 and 102102221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102221041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12182756 + ... + 12191133.

It is an arithmetic number, because the mean of its divisors is an integer number (13161900600).

Almost surely, 2^102102221021 is an apocalyptic number.

It is an amenable number.

102102221021 is a deficient number, since it is larger than the sum of its proper divisors (3192983779).

102102221021 is an equidigital number, since it uses as much as digits as its factorization.

102102221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24374019.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102102221021 its reverse (120122201201), we get a palindrome (222224422222).

The spelling of 102102221021 in words is "one hundred two billion, one hundred two million, two hundred twenty-one thousand, twenty-one".