1220413043554 has 32 divisors (see below), whose sum is σ = 2012778630576. Its totient is φ = 552628961280.

The previous prime is 1220413043453. The next prime is 1220413043567. The reversal of 1220413043554 is 4553403140221.

It can be written as a sum of positive squares in 8 ways, for example, as 763835796529 + 456577247025 = 873977^2 + 675705^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5894647 + ... + 6098170.

Almost surely, 2^{1220413043554} is an apocalyptic number.

1220413043554 is a deficient number, since it is larger than the sum of its proper divisors (792365587022).

1220413043554 is a wasteful number, since it uses less digits than its factorization.

1220413043554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11992950.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 1220413043554 its reverse (4553403140221), we get a palindrome (5773816183775).

The spelling of 1220413043554 in words is "one trillion, two hundred twenty billion, four hundred thirteen million, forty-three thousand, five hundred fifty-four".