102222021257 has 2 divisors, whose sum is σ = 102222021258.
Its totient is φ = 102222021256.
The previous prime is 102222021221. The next prime is 102222021269. The reversal of 102222021257 is 752120222201.
Adding to 102222021257 its reverse (752120222201), we get a palindrome (854342243458).
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 97126345801 + 5095675456 = 311651^2 + 71384^2
It is a cyclic number.
It is not a de Polignac number, because 102222021257 - 210 = 102222020233 is a prime.
It is not a weakly prime, because it can be changed into another prime (102222021157) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51111010628 + 51111010629.
It is an arithmetic number, because the mean of its divisors is an integer number (51111010629).
Almost surely, 2102222021257 is an apocalyptic number.
It is an amenable number.
102222021257 is a deficient number, since it is larger than the sum of its proper divisors (1).
102222021257 is an equidigital number, since it uses as much as digits as its factorization.
102222021257 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 2240, while the sum is 26.
The spelling of 102222021257 in words is "one hundred two billion, two hundred twenty-two million, twenty-one thousand, two hundred fifty-seven".