21021101133 has 8 divisors (see below), whose sum is σ = 28053231648. Its totient is φ = 14001519024.

The previous prime is 21021101107. The next prime is 21021101141. The reversal of 21021101133 is 33110112012.

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 21021101133 - 2⁹ = 21021100621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021101173) 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, 3133191 + ... + 3139892.

It is an arithmetic number, because the mean of its divisors is an integer number (3506653956).

Almost surely, 2^21021101133 is an apocalyptic number.

It is an amenable number.

21021101133 is a deficient number, since it is larger than the sum of its proper divisors (7032130515).

21021101133 is a wasteful number, since it uses less digits than its factorization.

21021101133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6274203.

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

Adding to 21021101133 its reverse (33110112012), we get a palindrome (54131213145).

The spelling of 21021101133 in words is "twenty-one billion, twenty-one million, one hundred one thousand, one hundred thirty-three".