1223252120 has 32 divisors (see below), whose sum is σ = 2776684320. Its totient is φ = 484968960.

The previous prime is 1223252087. The next prime is 1223252143. The reversal of 1223252120 is 212523221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1223252092 and 1223252101.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130796 + ... + 139835.

It is an arithmetic number, because the mean of its divisors is an integer number (86771385).

Almost surely, 2^1223252120 is an apocalyptic number.

1223252120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223252120 is an abundant number, since it is smaller than the sum of its proper divisors (1553432200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223252120 is a wasteful number, since it uses less digits than its factorization.

1223252120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270755 (or 270751 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1223252120 is about 34975.0213724023. The cubic root of 1223252120 is about 1069.4783377296.

Adding to 1223252120 its reverse (212523221), we get a palindrome (1435775341).

The spelling of 1223252120 in words is "one billion, two hundred twenty-three million, two hundred fifty-two thousand, one hundred twenty".