102221210021 has 8 divisors (see below), whose sum is σ = 117377911104. Its totient is φ = 87202926720.

The previous prime is 102221209999. The next prime is 102221210029. The reversal of 102221210021 is 120012122201.

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

It is not a de Polignac number, because 102221210021 - 2²² = 102217015717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102221209978 and 102221210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102221210029) 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, 34602860 + ... + 34605813.

It is an arithmetic number, because the mean of its divisors is an integer number (14672238888).

Almost surely, 2^102221210021 is an apocalyptic number.

It is an amenable number.

102221210021 is a deficient number, since it is larger than the sum of its proper divisors (15156701083).

102221210021 is an equidigital number, since it uses as much as digits as its factorization.

102221210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69208891.

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

Adding to 102221210021 its reverse (120012122201), we get a palindrome (222233332222).

The spelling of 102221210021 in words is "one hundred two billion, two hundred twenty-one million, two hundred ten thousand, twenty-one".