21010320133 has 8 divisors (see below), whose sum is σ = 22931346240. Its totient is φ = 19091126880.

The previous prime is 21010320103. The next prime is 21010320169. The reversal of 21010320133 is 33102301012.

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 21010320133 - 2⁹ = 21010319621 is a prime.

It is a super-2 number, since 2×21010320133² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010320103) 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, 434185 + ... + 480142.

It is an arithmetic number, because the mean of its divisors is an integer number (2866418280).

Almost surely, 2^21010320133 is an apocalyptic number.

It is an amenable number.

21010320133 is a deficient number, since it is larger than the sum of its proper divisors (1921026107).

21010320133 is a wasteful number, since it uses less digits than its factorization.

21010320133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916427.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21010320133 its reverse (33102301012), we get a palindrome (54112621145).

It can be divided in two parts, 21010 and 320133, that added together give a palindrome (341143).

The spelling of 21010320133 in words is "twenty-one billion, ten million, three hundred twenty thousand, one hundred thirty-three".