102220221121 has 4 divisors (see below), whose sum is σ = 102235196500. Its totient is φ = 102205245744.

The previous prime is 102220221109. The next prime is 102220221193. The reversal of 102220221121 is 121122022201.

It is a happy number.

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 24231280896 + 77988940225 = 155664^2 + 279265^2 .

It is a cyclic number.

It is not a de Polignac number, because 102220221121 - 2¹³ = 102220212929 is a prime.

It is a super-2 number, since 2×102220221121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102220221095 and 102220221104.

It is not an unprimeable number, because it can be changed into a prime (102220221821) 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 3 ways as a sum of consecutive naturals, for example, 7477446 + ... + 7491103.

It is an arithmetic number, because the mean of its divisors is an integer number (25558799125).

Almost surely, 2^102220221121 is an apocalyptic number.

It is an amenable number.

102220221121 is a deficient number, since it is larger than the sum of its proper divisors (14975379).

102220221121 is an equidigital number, since it uses as much as digits as its factorization.

102220221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14975378.

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

Adding to 102220221121 its reverse (121122022201), we get a palindrome (223342243322).

The spelling of 102220221121 in words is "one hundred two billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twenty-one".