1220133240520 has 128 divisors (see below), whose sum is σ = 2977049687040. Its totient is φ = 448260341760.

The previous prime is 1220133240509. The next prime is 1220133240533. The reversal of 1220133240520 is 250423310221.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33695625 + ... + 33731815.

It is an arithmetic number, because the mean of its divisors is an integer number (23258200680).

Almost surely, 2^{1220133240520} is an apocalyptic number.

1220133240520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220133240520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1488524843520).

1220133240520 is an abundant number, since it is smaller than the sum of its proper divisors (1756916446520).

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

1220133240520 is a wasteful number, since it uses less digits than its factorization.

1220133240520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37415 (or 37411 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 1220133240520 its reverse (250423310221), we get a palindrome (1470556550741).

The spelling of 1220133240520 in words is "one trillion, two hundred twenty billion, one hundred thirty-three million, two hundred forty thousand, five hundred twenty".