102222220221 has 24 divisors (see below), whose sum is σ = 161595420480. Its totient is φ = 61753636800.

The previous prime is 102222220187. The next prime is 102222220231. The reversal of 102222220221 is 122022222201.

102222220221 is a `hidden beast` number, since 1 + 0 + 2 + 222 + 220 + 221 = 666.

It is not a de Polignac number, because 102222220221 - 2¹¹ = 102222218173 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102222220194 and 102222220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102222220231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1629256 + ... + 1690833.

It is an arithmetic number, because the mean of its divisors is an integer number (6733142520).

Almost surely, 2^102222220221 is an apocalyptic number.

102222220221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102222220221 is a deficient number, since it is larger than the sum of its proper divisors (59373200259).

102222220221 is a wasteful number, since it uses less digits than its factorization.

102222220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320417 (or 3320414 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 102222220221 its reverse (122022222201), we get a palindrome (224244442422).

The spelling of 102222220221 in words is "one hundred two billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".