1223405105554 has 4 divisors (see below), whose sum is σ = 1835107658334. Its totient is φ = 611702552776.

The previous prime is 1223405105539. The next prime is 1223405105563. The reversal of 1223405105554 is 4555015043221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1220571992025 + 2833113529 = 1104795^2 + 53227^2 .

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 as a sum of consecutive naturals, namely, 305851276387 + ... + 305851276390.

Almost surely, 2^{1223405105554} is an apocalyptic number.

1223405105554 is a deficient number, since it is larger than the sum of its proper divisors (611702552780).

1223405105554 is an equidigital number, since it uses as much as digits as its factorization.

1223405105554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611702552779.

The product of its (nonzero) digits is 120000, while the sum is 37.

The spelling of 1223405105554 in words is "one trillion, two hundred twenty-three billion, four hundred five million, one hundred five thousand, five hundred fifty-four".