126221061603554 has 32 divisors (see below), whose sum is σ = 193191330705984. Its totient is φ = 61827511345600.

The previous prime is 126221061603493. The next prime is 126221061603563. The reversal of 126221061603554 is 455306160122621.

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, 1423881557 + ... + 1423970199.

It is an arithmetic number, because the mean of its divisors is an integer number (6037229084562).

Almost surely, 2^{126221061603554} is an apocalyptic number.

126221061603554 is a deficient number, since it is larger than the sum of its proper divisors (66970269102430).

126221061603554 is a wasteful number, since it uses less digits than its factorization.

126221061603554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108562.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 126221061603554 in words is "one hundred twenty-six trillion, two hundred twenty-one billion, sixty-one million, six hundred three thousand, five hundred fifty-four".