1220124120500 has 24 divisors (see below), whose sum is σ = 2664751080264. Its totient is φ = 488049648000.

The previous prime is 1220124120499. The next prime is 1220124120503. The reversal of 1220124120500 is 50214210221.

It can be written as a sum of positive squares in 4 ways, for example, as 98774432656 + 1121349687844 = 314284^2 + 1058938^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220124120503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1220123621 + ... + 1220124620.

It is an arithmetic number, because the mean of its divisors is an integer number (111031295011).

Almost surely, 2^{1220124120500} is an apocalyptic number.

1220124120500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220124120500 is an abundant number, since it is smaller than the sum of its proper divisors (1444626959764).

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

1220124120500 is a wasteful number, since it uses less digits than its factorization.

1220124120500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440248260 (or 2440248248 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

Adding to 1220124120500 its reverse (50214210221), we get a palindrome (1270338330721).

The spelling of 1220124120500 in words is "one trillion, two hundred twenty billion, one hundred twenty-four million, one hundred twenty thousand, five hundred".