20211111021211 has 8 divisors (see below), whose sum is σ = 22266786580848. Its totient is φ = 18191819100000.

The previous prime is 20211111021181. The next prime is 20211111021247. The reversal of 20211111021211 is 11212011111202.

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 20211111021211 - 2¹³ = 20211111013019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20211111021011) 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, 9095908440 + ... + 9095910661.

It is an arithmetic number, because the mean of its divisors is an integer number (2783348322606).

Almost surely, 2^{20211111021211} is an apocalyptic number.

20211111021211 is a deficient number, since it is larger than the sum of its proper divisors (2055675559637).

20211111021211 is a wasteful number, since it uses less digits than its factorization.

20211111021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18191819213.

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

Adding to 20211111021211 its reverse (11212011111202), we get a palindrome (31423122132413).

The spelling of 20211111021211 in words is "twenty trillion, two hundred eleven billion, one hundred eleven million, twenty-one thousand, two hundred eleven".