42862684387221 has 6 divisors (see below), whose sum is σ = 61912766337110. Its totient is φ = 28575122924808.

The previous prime is 42862684387219. The next prime is 42862684387249. The reversal of 42862684387221 is 12278348626824.

42862684387221 is a `hidden beast` number, since 4 + 2 + 8 + 6 + 26 + 8 + 4 + 387 + 221 = 666.

It can be written as a sum of positive squares in only one way, i.e., 39650811078321 + 3211873308900 = 6296889^2 + 1792170^2 .

It is not a de Polignac number, because 42862684387221 - 2¹ = 42862684387219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42862684383221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2381260243726 + ... + 2381260243743.

Almost surely, 2^{42862684387221} is an apocalyptic number.

It is an amenable number.

42862684387221 is a deficient number, since it is larger than the sum of its proper divisors (19050081949889).

42862684387221 is a wasteful number, since it uses less digits than its factorization.

42862684387221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4762520487475 (or 4762520487472 counting only the distinct ones).

The product of its digits is 99090432, while the sum is 63.

The spelling of 42862684387221 in words is "forty-two trillion, eight hundred sixty-two billion, six hundred eighty-four million, three hundred eighty-seven thousand, two hundred twenty-one".