1220543551055 has 32 divisors (see below), whose sum is σ = 1486217937600. Its totient is φ = 962180703232.

The previous prime is 1220543551039. The next prime is 1220543551063. The reversal of 1220543551055 is 5501553450221.

It is a cyclic number.

It is not a de Polignac number, because 1220543551055 - 2⁴ = 1220543551039 is a prime.

It is a super-2 number, since 2×1220543551055² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78086981 + ... + 78102609.

It is an arithmetic number, because the mean of its divisors is an integer number (46444310550).

Almost surely, 2^{1220543551055} is an apocalyptic number.

1220543551055 is a deficient number, since it is larger than the sum of its proper divisors (265674386545).

1220543551055 is a wasteful number, since it uses less digits than its factorization.

1220543551055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16603.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 1220543551055 in words is "one trillion, two hundred twenty billion, five hundred forty-three million, five hundred fifty-one thousand, fifty-five".