1220421022443 has 40 divisors (see below), whose sum is σ = 2094010899200. Its totient is φ = 693878937840.

The previous prime is 1220421022423. The next prime is 1220421022463. The reversal of 1220421022443 is 3442201240221.

It is a happy number.

1220421022443 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 4 + 210 + 2 + 2 + 443 = 666.

It is an interprime number because it is at equal distance from previous prime (1220421022423) and next prime (1220421022463).

It is not a de Polignac number, because 1220421022443 - 2¹⁰ = 1220421021419 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220421022423) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5295253 + ... + 5520918.

It is an arithmetic number, because the mean of its divisors is an integer number (52350272480).

Almost surely, 2^{1220421022443} is an apocalyptic number.

1220421022443 is a deficient number, since it is larger than the sum of its proper divisors (873589876757).

1220421022443 is a wasteful number, since it uses less digits than its factorization.

1220421022443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10816389 (or 10816380 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 1220421022443 its reverse (3442201240221), we get a palindrome (4662622262664).

The spelling of 1220421022443 in words is "one trillion, two hundred twenty billion, four hundred twenty-one million, twenty-two thousand, four hundred forty-three".