21214025126261 has 8 divisors (see below), whose sum is σ = 23196267934848. Its totient is φ = 19240731496000.

The previous prime is 21214025126207. The next prime is 21214025126299. The reversal of 21214025126261 is 16262152041212.

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

It is a cyclic number.

It is not a de Polignac number, because 21214025126261 - 2³⁸ = 20939147219317 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 (21214025123261) 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 7 ways as a sum of consecutive naturals, for example, 2237289620 + ... + 2237299101.

It is an arithmetic number, because the mean of its divisors is an integer number (2899533491856).

Almost surely, 2^{21214025126261} is an apocalyptic number.

It is an amenable number.

21214025126261 is a deficient number, since it is larger than the sum of its proper divisors (1982242808587).

21214025126261 is a wasteful number, since it uses less digits than its factorization.

21214025126261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4474589163.

The product of its (nonzero) digits is 23040, while the sum is 35.

Adding to 21214025126261 its reverse (16262152041212), we get a palindrome (37476177167473).

The spelling of 21214025126261 in words is "twenty-one trillion, two hundred fourteen billion, twenty-five million, one hundred twenty-six thousand, two hundred sixty-one".