21021212311333 has 16 divisors (see below), whose sum is σ = 22812905304000. Its totient is φ = 19254617763840.

The previous prime is 21021212311331. The next prime is 21021212311453. The reversal of 21021212311333 is 33311321212012.

It is a cyclic number.

It is not a de Polignac number, because 21021212311333 - 2¹ = 21021212311331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021212311298 and 21021212311307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021212311331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477093 + ... + 6501541.

It is an arithmetic number, because the mean of its divisors is an integer number (1425806581500).

Almost surely, 2^{21021212311333} is an apocalyptic number.

It is an amenable number.

21021212311333 is a deficient number, since it is larger than the sum of its proper divisors (1791692992667).

21021212311333 is a wasteful number, since it uses less digits than its factorization.

21021212311333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026532.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21021212311333 its reverse (33311321212012), we get a palindrome (54332533523345).

The spelling of 21021212311333 in words is "twenty-one trillion, twenty-one billion, two hundred twelve million, three hundred eleven thousand, three hundred thirty-three".