102220011221 has 4 divisors (see below), whose sum is σ = 104148690732. Its totient is φ = 100291331712.

The previous prime is 102220011181. The next prime is 102220011239. The reversal of 102220011221 is 122110022201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83455120996 + 18764890225 = 288886^2 + 136985^2 .

It is a cyclic number.

It is not a de Polignac number, because 102220011221 - 2¹⁰ = 102220010197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102220011196 and 102220011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102220011251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964339676 + ... + 964339781.

It is an arithmetic number, because the mean of its divisors is an integer number (26037172683).

Almost surely, 2^102220011221 is an apocalyptic number.

It is an amenable number.

102220011221 is a deficient number, since it is larger than the sum of its proper divisors (1928679511).

102220011221 is an equidigital number, since it uses as much as digits as its factorization.

102220011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928679510.

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

Adding to 102220011221 its reverse (122110022201), we get a palindrome (224330033422).

The spelling of 102220011221 in words is "one hundred two billion, two hundred twenty million, eleven thousand, two hundred twenty-one".