21010132001 has 4 divisors (see below), whose sum is σ = 21011243412. Its totient is φ = 21009020592.

The previous prime is 21010131991. The next prime is 21010132049. The reversal of 21010132001 is 10023101012.

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 5334841600 + 15675290401 = 73040^2 + 125201^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010132001 - 2¹⁴ = 21010115617 is a prime.

It is a super-3 number, since 3×21010132001³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010132051) 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, 526850 + ... + 565323.

It is an arithmetic number, because the mean of its divisors is an integer number (5252810853).

Almost surely, 2^21010132001 is an apocalyptic number.

It is an amenable number.

21010132001 is a deficient number, since it is larger than the sum of its proper divisors (1111411).

21010132001 is a wasteful number, since it uses less digits than its factorization.

21010132001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111410.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21010132001 its reverse (10023101012), we get a palindrome (31033233013).

The spelling of 21010132001 in words is "twenty-one billion, ten million, one hundred thirty-two thousand, one".