102122221021 has 8 divisors (see below), whose sum is σ = 102239788280. Its totient is φ = 102004697088.

The previous prime is 102122220913. The next prime is 102122221049. The reversal of 102122221021 is 120122221201.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78800349796 + 23321871225 = 280714^2 + 152715^2 .

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 102122221021 - 2²³ = 102113832413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102122220986 and 102122221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102122221051) 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, 7537165 + ... + 7550701.

It is an arithmetic number, because the mean of its divisors is an integer number (12779973535).

Almost surely, 2^102122221021 is an apocalyptic number.

It is an amenable number.

102122221021 is a deficient number, since it is larger than the sum of its proper divisors (117567259).

102122221021 is a wasteful number, since it uses less digits than its factorization.

102122221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21663.

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

Adding to 102122221021 its reverse (120122221201), we get a palindrome (222244442222).

The spelling of 102122221021 in words is "one hundred two billion, one hundred twenty-two million, two hundred twenty-one thousand, twenty-one".