21031421100133 has 8 divisors (see below), whose sum is σ = 22141394660000. Its totient is φ = 19921753206288.

The previous prime is 21031421100121. The next prime is 21031421100139. The reversal of 21031421100133 is 33100112413012.

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 21031421100133 - 2¹⁷ = 21031420969061 is a prime.

It is a super-2 number, since 2×21031421100133² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031421100139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76275258 + ... + 76550491.

It is an arithmetic number, because the mean of its divisors is an integer number (2767674332500).

Almost surely, 2^{21031421100133} is an apocalyptic number.

It is an amenable number.

21031421100133 is a deficient number, since it is larger than the sum of its proper divisors (1109973559867).

21031421100133 is a wasteful number, since it uses less digits than its factorization.

21031421100133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152833011.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21031421100133 its reverse (33100112413012), we get a palindrome (54131533513145).

The spelling of 21031421100133 in words is "twenty-one trillion, thirty-one billion, four hundred twenty-one million, one hundred thousand, one hundred thirty-three".