1213420553220 has 48 divisors (see below), whose sum is σ = 3397752529920. Its totient is φ = 323562149376.

The previous prime is 1213420553197. The next prime is 1213420553243. The reversal of 1213420553220 is 223550243121.

It is an interprime number because it is at equal distance from previous prime (1213420553197) and next prime (1213420553243).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 676701 + ... + 1698459.

It is an arithmetic number, because the mean of its divisors is an integer number (70786511040).

Almost surely, 2^{1213420553220} is an apocalyptic number.

1213420553220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213420553220 is an abundant number, since it is smaller than the sum of its proper divisors (2184331976700).

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

1213420553220 is a wasteful number, since it uses less digits than its factorization.

1213420553220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041564 (or 1041562 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 1213420553220 its reverse (223550243121), we get a palindrome (1436970796341).

The spelling of 1213420553220 in words is "one trillion, two hundred thirteen billion, four hundred twenty million, five hundred fifty-three thousand, two hundred twenty".