44168971221 has 40 divisors (see below), whose sum is σ = 67664248344. Its totient is φ = 28696273920.

The previous prime is 44168971201. The next prime is 44168971261. The reversal of 44168971221 is 12217986144.

44168971221 is a `hidden beast` number, since 4 + 416 + 8 + 9 + 7 + 1 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5948721 + 44163022500 = 2439^2 + 210150^2 .

It is not a de Polignac number, because 44168971221 - 2²⁷ = 44034753493 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44168971201) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3237811 + ... + 3251423.

Almost surely, 2^44168971221 is an apocalyptic number.

44168971221 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

44168971221 is a deficient number, since it is larger than the sum of its proper divisors (23495277123).

44168971221 is a wasteful number, since it uses less digits than its factorization.

44168971221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14643 (or 14634 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 44168971221 in words is "forty-four billion, one hundred sixty-eight million, nine hundred seventy-one thousand, two hundred twenty-one".