221656472441402 has 16 divisors (see below), whose sum is σ = 343529244571392. Its totient is φ = 107205628442640.

The previous prime is 221656472441401. The next prime is 221656472441447. The reversal of 221656472441402 is 204144274656122.

It is not an unprimeable number, because it can be changed into a prime (221656472441401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14726040338 + ... + 14726055389.

It is an arithmetic number, because the mean of its divisors is an integer number (21470577785712).

Almost surely, 2^{221656472441402} is an apocalyptic number.

221656472441402 is a deficient number, since it is larger than the sum of its proper divisors (121872772129990).

221656472441402 is a wasteful number, since it uses less digits than its factorization.

221656472441402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29452095853.

The product of its (nonzero) digits is 5160960, while the sum is 50.

The spelling of 221656472441402 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred seventy-two million, four hundred forty-one thousand, four hundred two".