102121022221 has 8 divisors (see below), whose sum is σ = 102388696704. Its totient is φ = 101853651120.

The previous prime is 102121022219. The next prime is 102121022231. The reversal of 102121022221 is 122220121201.

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 102121022221 - 2¹ = 102121022219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102121022195 and 102121022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121022231) 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, 606256 + ... + 756166.

It is an arithmetic number, because the mean of its divisors is an integer number (12798587088).

Almost surely, 2^102121022221 is an apocalyptic number.

It is an amenable number.

102121022221 is a deficient number, since it is larger than the sum of its proper divisors (267674483).

102121022221 is a wasteful number, since it uses less digits than its factorization.

102121022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151691.

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

Adding to 102121022221 its reverse (122220121201), we get a palindrome (224341143422).

The spelling of 102121022221 in words is "one hundred two billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-one".