221672477265811 has 16 divisors (see below), whose sum is σ = 266778270446688. Its totient is φ = 181481816620800.

The previous prime is 221672477265719. The next prime is 221672477265823. The reversal of 221672477265811 is 118562774276122.

It is a cyclic number.

It is not a de Polignac number, because 221672477265811 - 2³³ = 221663887331219 is a prime.

It is a super-2 number, since 2×221672477265811² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221672477265811.

It is not an unprimeable number, because it can be changed into a prime (221672477265851) 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 15 ways as a sum of consecutive naturals, for example, 18904350036 + ... + 18904361761.

It is an arithmetic number, because the mean of its divisors is an integer number (16673641902918).

Almost surely, 2^{221672477265811} is an apocalyptic number.

221672477265811 is a deficient number, since it is larger than the sum of its proper divisors (45105793180877).

221672477265811 is a wasteful number, since it uses less digits than its factorization.

221672477265811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37808711862.

The product of its digits is 31610880, while the sum is 61.

The spelling of 221672477265811 in words is "two hundred twenty-one trillion, six hundred seventy-two billion, four hundred seventy-seven million, two hundred sixty-five thousand, eight hundred eleven".