21212101033 has 8 divisors (see below), whose sum is σ = 22558817952. Its totient is φ = 19876378176.

The previous prime is 21212100983. The next prime is 21212101039. The reversal of 21212101033 is 33010121212.

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 21212101033 - 2³³ = 12622166441 is a prime.

It is a super-3 number, since 3×21212101033³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21212100998 and 21212101016.

It is not an unprimeable number, because it can be changed into a prime (21212101039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2744535 + ... + 2752252.

It is an arithmetic number, because the mean of its divisors is an integer number (2819852244).

Almost surely, 2^21212101033 is an apocalyptic number.

It is an amenable number.

21212101033 is a deficient number, since it is larger than the sum of its proper divisors (1346716919).

21212101033 is a wasteful number, since it uses less digits than its factorization.

21212101033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497031.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21212101033 its reverse (33010121212), we get a palindrome (54222222245).

The spelling of 21212101033 in words is "twenty-one billion, two hundred twelve million, one hundred one thousand, thirty-three".