4021136643261 has 8 divisors (see below), whose sum is σ = 5400087579040. Its totient is φ = 2661471734832.

The previous prime is 4021136643233. The next prime is 4021136643361. The reversal of 4021136643261 is 1623466311204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4021136643261 - 2¹¹ = 4021136641213 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 (4021136643361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4821506350 + ... + 4821507183.

It is an arithmetic number, because the mean of its divisors is an integer number (675010947380).

Almost surely, 2^{4021136643261} is an apocalyptic number.

It is an amenable number.

4021136643261 is a deficient number, since it is larger than the sum of its proper divisors (1378950935779).

4021136643261 is a wasteful number, since it uses less digits than its factorization.

4021136643261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9643013675.

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 4021136643261 in words is "four trillion, twenty-one billion, one hundred thirty-six million, six hundred forty-three thousand, two hundred sixty-one".