21021133101 has 8 divisors (see below), whose sum is σ = 28030599744. Its totient is φ = 14012877600.

The previous prime is 21021133099. The next prime is 21021133157. The reversal of 21021133101 is 10133112012.

It is a happy number.

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

It is not a de Polignac number, because 21021133101 - 2¹ = 21021133099 is a prime.

It is a super-4 number, since 4×21021133101⁴ (a number of 42 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021173101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261481 + ... + 332286.

It is an arithmetic number, because the mean of its divisors is an integer number (3503824968).

Almost surely, 2^21021133101 is an apocalyptic number.

It is an amenable number.

21021133101 is a deficient number, since it is larger than the sum of its proper divisors (7009466643).

21021133101 is a wasteful number, since it uses less digits than its factorization.

21021133101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605571.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21021133101 its reverse (10133112012), we get a palindrome (31154245113).

The spelling of 21021133101 in words is "twenty-one billion, twenty-one million, one hundred thirty-three thousand, one hundred one".