1220210123 has 16 divisors (see below), whose sum is σ = 1343278080.
Its totient is φ = 1099207200.
The previous prime is 1220210107. The next prime is 1220210129. The reversal of 1220210123 is 3210120221.
It is a happy number.
It is a cyclic number.
It is not a de Polignac number, because 1220210123 - 24 = 1220210107 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1220210098 and 1220210107.
It is not an unprimeable number, because it can be changed into a prime (1220210129) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847238 + ... + 848676.
It is an arithmetic number, because the mean of its divisors is an integer number (83954880).
Almost surely, 21220210123 is an apocalyptic number.
1220210123 is a deficient number, since it is larger than the sum of its proper divisors (123067957).
1220210123 is a wasteful number, since it uses less digits than its factorization.
1220210123 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2098.
The product of its (nonzero) digits is 48, while the sum is 14.
The square root of 1220210123 is about 34931.5061656379.
The cubic root of 1220210123 is about 1068.5910716198.
Adding to 1220210123 its reverse (3210120221), we get a palindrome (4430330344).
The spelling of 1220210123 in words is "one billion, two hundred twenty million, two hundred ten thousand, one hundred twenty-three".