1242120300220 has 24 divisors (see below), whose sum is σ = 2624455414224. Its totient is φ = 493799970816.

The previous prime is 1242120300209. The next prime is 1242120300227. The reversal of 1242120300220 is 220030212421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242120300227) 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, 190505989 + ... + 190512508.

It is an arithmetic number, because the mean of its divisors is an integer number (109352308926).

Almost surely, 2^{1242120300220} is an apocalyptic number.

1242120300220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1242120300220 is an abundant number, since it is smaller than the sum of its proper divisors (1382335114004).

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

1242120300220 is a wasteful number, since it uses less digits than its factorization.

1242120300220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381018669 (or 381018667 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 1242120300220 its reverse (220030212421), we get a palindrome (1462150512641).

The spelling of 1242120300220 in words is "one trillion, two hundred forty-two billion, one hundred twenty million, three hundred thousand, two hundred twenty".