1220025335520 has 48 divisors (see below), whose sum is σ = 3843079808400. Its totient is φ = 325340089344.

The previous prime is 1220025335513. The next prime is 1220025335521. The reversal of 1220025335520 is 255335200221.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220025335521) 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, 1270859245 + ... + 1270860204.

It is an arithmetic number, because the mean of its divisors is an integer number (80064162675).

Almost surely, 2^{1220025335520} is an apocalyptic number.

1220025335520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220025335520 is an abundant number, since it is smaller than the sum of its proper divisors (2623054472880).

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

1220025335520 is a wasteful number, since it uses less digits than its factorization.

1220025335520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2541719467 (or 2541719459 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 1220025335520 in words is "one trillion, two hundred twenty billion, twenty-five million, three hundred thirty-five thousand, five hundred twenty".