21210202111033 has 8 divisors (see below), whose sum is σ = 23272732650888. Its totient is φ = 19209239647104.

The previous prime is 21210202110989. The next prime is 21210202111057. The reversal of 21210202111033 is 33011120201212.

It can be written as a sum of positive squares in 4 ways, for example, as 2307506826304 + 18902695284729 = 1519048^2 + 4347723^2 .

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

It is not a de Polignac number, because 21210202111033 - 2¹³ = 21210202102841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21210202111033.

It is not an unprimeable number, because it can be changed into a prime (21210202181033) 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, 15392018260 + ... + 15392019637.

It is an arithmetic number, because the mean of its divisors is an integer number (2909091581361).

Almost surely, 2^{21210202111033} is an apocalyptic number.

It is an amenable number.

21210202111033 is a deficient number, since it is larger than the sum of its proper divisors (2062530539855).

21210202111033 is a wasteful number, since it uses less digits than its factorization.

21210202111033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30784037963.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21210202111033 its reverse (33011120201212), we get a palindrome (54221322312245).

The spelling of 21210202111033 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, one hundred eleven thousand, thirty-three".