1220520424020 has 96 divisors (see below), whose sum is σ = 3695473248768. Its totient is φ = 299809093632.

The previous prime is 1220520423977. The next prime is 1220520424021. The reversal of 1220520424020 is 204240250221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220520424021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12681727 + ... + 12777606.

It is an arithmetic number, because the mean of its divisors is an integer number (38494513008).

Almost surely, 2^{1220520424020} is an apocalyptic number.

1220520424020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220520424020 is an abundant number, since it is smaller than the sum of its proper divisors (2474952824748).

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

1220520424020 is a wasteful number, since it uses less digits than its factorization.

1220520424020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25459409 (or 25459407 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

Adding to 1220520424020 its reverse (204240250221), we get a palindrome (1424760674241).

The spelling of 1220520424020 in words is "one trillion, two hundred twenty billion, five hundred twenty million, four hundred twenty-four thousand, twenty".