11212021211 has 4 divisors (see below), whose sum is σ = 11323031424. Its totient is φ = 11101011000.

The previous prime is 11212021207. The next prime is 11212021213.

11212021211 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11212021211 - 2² = 11212021207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11212021213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55504955 + ... + 55505156.

It is an arithmetic number, because the mean of its divisors is an integer number (2830757856).

Almost surely, 2^11212021211 is an apocalyptic number.

11212021211 is a deficient number, since it is larger than the sum of its proper divisors (111010213).

11212021211 is a wasteful number, since it uses less digits than its factorization.

11212021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111010212.

The product of its (nonzero) digits is 16, while the sum is 14.

It can be divided in two parts, 112120 and 21211, that added together give a palindrome (133331).

The spelling of 11212021211 in words is "eleven billion, two hundred twelve million, twenty-one thousand, two hundred eleven".