1220510423125 has 80 divisors (see below), whose sum is σ = 1783013253120. Its totient is φ = 817780824000.

The previous prime is 1220510423123. The next prime is 1220510423137. The reversal of 1220510423125 is 5213240150221.

It is a happy number.

It is not a de Polignac number, because 1220510423125 - 2¹ = 1220510423123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1220510423093 and 1220510423102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220510423123) 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 in 79 ways as a sum of consecutive naturals, for example, 135502372 + ... + 135511378.

It is an arithmetic number, because the mean of its divisors is an integer number (22287665664).

Almost surely, 2^{1220510423125} is an apocalyptic number.

It is an amenable number.

1220510423125 is a deficient number, since it is larger than the sum of its proper divisors (562502829995).

1220510423125 is an frugal number, since it uses more digits than its factorization.

1220510423125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9740 (or 9725 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 1220510423125 its reverse (5213240150221), we get a palindrome (6433750573346).

The spelling of 1220510423125 in words is "one trillion, two hundred twenty billion, five hundred ten million, four hundred twenty-three thousand, one hundred twenty-five".