1220353302420 has 384 divisors, whose sum is σ = 4582080921600. Its totient is φ = 263407832064.

The previous prime is 1220353302383. The next prime is 1220353302479. The reversal of 1220353302420 is 242033530221.

1220353302420 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 353 + 302 + 4 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 22452517 + ... + 22506803.

It is an arithmetic number, because the mean of its divisors is an integer number (11932502400).

Almost surely, 2^{1220353302420} is an apocalyptic number.

1220353302420 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 1220353302420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2291040460800).

1220353302420 is an abundant number, since it is smaller than the sum of its proper divisors (3361727619180).

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

1220353302420 is a wasteful number, since it uses less digits than its factorization.

1220353302420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54644 (or 54636 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

Adding to 1220353302420 its reverse (242033530221), we get a palindrome (1462386832641).

The spelling of 1220353302420 in words is "one trillion, two hundred twenty billion, three hundred fifty-three million, three hundred two thousand, four hundred twenty".