21167712301 has 4 divisors (see below), whose sum is σ = 21302538652. Its totient is φ = 21032885952.

The previous prime is 21167712289. The next prime is 21167712323. The reversal of 21167712301 is 10321776112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12695430276 + 8472282025 = 112674^2 + 92045^2 .

It is a cyclic number.

It is not a de Polignac number, because 21167712301 - 2¹³ = 21167704109 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 (21167712701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67412940 + ... + 67413253.

It is an arithmetic number, because the mean of its divisors is an integer number (5325634663).

Almost surely, 2^21167712301 is an apocalyptic number.

It is an amenable number.

21167712301 is a deficient number, since it is larger than the sum of its proper divisors (134826351).

21167712301 is a wasteful number, since it uses less digits than its factorization.

21167712301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134826350.

The product of its (nonzero) digits is 3528, while the sum is 31.

The spelling of 21167712301 in words is "twenty-one billion, one hundred sixty-seven million, seven hundred twelve thousand, three hundred one".