1220401344055 has 16 divisors (see below), whose sum is σ = 1465534264320. Its totient is φ = 975619557792.

The previous prime is 1220401344049. The next prime is 1220401344061. The reversal of 1220401344055 is 5504431040221.

It is an interprime number because it is at equal distance from previous prime (1220401344049) and next prime (1220401344061).

It is a cyclic number.

It is not a de Polignac number, because 1220401344055 - 2³ = 1220401344047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49745202 + ... + 49769728.

It is an arithmetic number, because the mean of its divisors is an integer number (91595891520).

Almost surely, 2^{1220401344055} is an apocalyptic number.

1220401344055 is a deficient number, since it is larger than the sum of its proper divisors (245132920265).

1220401344055 is a wasteful number, since it uses less digits than its factorization.

1220401344055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31278.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 1220401344055 its reverse (5504431040221), we get a palindrome (6724832384276).

The spelling of 1220401344055 in words is "one trillion, two hundred twenty billion, four hundred one million, three hundred forty-four thousand, fifty-five".