21212033212011 has 8 divisors (see below), whose sum is σ = 28574285289424. Its totient is φ = 13995568304640.

The previous prime is 21212033211973. The next prime is 21212033212037. The reversal of 21212033212011 is 11021233021212.

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

It is not a de Polignac number, because 21212033212011 - 2¹⁸ = 21212032949867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212033212091) 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, 36446792170 + ... + 36446792751.

It is an arithmetic number, because the mean of its divisors is an integer number (3571785661178).

Almost surely, 2^{21212033212011} is an apocalyptic number.

21212033212011 is a deficient number, since it is larger than the sum of its proper divisors (7362252077413).

21212033212011 is an equidigital number, since it uses as much as digits as its factorization.

21212033212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72893585021.

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

Adding to 21212033212011 its reverse (11021233021212), we get a palindrome (32233266233223).

The spelling of 21212033212011 in words is "twenty-one trillion, two hundred twelve billion, thirty-three million, two hundred twelve thousand, eleven".