221431426042611 has 16 divisors (see below), whose sum is σ = 304794288601088. Its totient is φ = 142845646305600.

The previous prime is 221431426042609. The next prime is 221431426042637. The reversal of 221431426042611 is 116240624134122.

It is not a de Polignac number, because 221431426042611 - 2¹ = 221431426042609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221431426042611.

It is not an unprimeable number, because it can be changed into a prime (221431426042601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110150506 + ... + 112142751.

It is an arithmetic number, because the mean of its divisors is an integer number (19049643037568).

Almost surely, 2^{221431426042611} is an apocalyptic number.

221431426042611 is a deficient number, since it is larger than the sum of its proper divisors (83362862558477).

221431426042611 is a wasteful number, since it uses less digits than its factorization.

221431426042611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222304002.

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 221431426042611 in words is "two hundred twenty-one trillion, four hundred thirty-one billion, four hundred twenty-six million, forty-two thousand, six hundred eleven".