102012221221 has 8 divisors (see below), whose sum is σ = 102097144800. Its totient is φ = 101927337648.

The previous prime is 102012221197. The next prime is 102012221231. The reversal of 102012221221 is 122122210201.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 102012221221 - 2⁵ = 102012221189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102012221195 and 102012221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102012221231) 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, 6932730 + ... + 6947428.

It is an arithmetic number, because the mean of its divisors is an integer number (12762143100).

Almost surely, 2^102012221221 is an apocalyptic number.

It is an amenable number.

102012221221 is a deficient number, since it is larger than the sum of its proper divisors (84923579).

102012221221 is a wasteful number, since it uses less digits than its factorization.

102012221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20003.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 102012221221 its reverse (122122210201), we get a palindrome (224134431422).

The spelling of 102012221221 in words is "one hundred two billion, twelve million, two hundred twenty-one thousand, two hundred twenty-one".