21021212302311 has 8 divisors (see below), whose sum is σ = 30184304844400. Its totient is φ = 12936130647552.

The previous prime is 21021212302231. The next prime is 21021212302351. The reversal of 21021212302311 is 11320321212012.

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

It is not a de Polignac number, because 21021212302311 - 2¹⁸ = 21021212040167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021212302351) 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, 269502721786 + ... + 269502721863.

It is an arithmetic number, because the mean of its divisors is an integer number (3773038105550).

Almost surely, 2^{21021212302311} is an apocalyptic number.

21021212302311 is a deficient number, since it is larger than the sum of its proper divisors (9163092542089).

21021212302311 is a wasteful number, since it uses less digits than its factorization.

21021212302311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539005443665.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21021212302311 its reverse (11320321212012), we get a palindrome (32341533514323).

The spelling of 21021212302311 in words is "twenty-one trillion, twenty-one billion, two hundred twelve million, three hundred two thousand, three hundred eleven".