11212021001011 has 4 divisors (see below), whose sum is σ = 11699500174992. Its totient is φ = 10724541827032.

The previous prime is 11212021000997. The next prime is 11212021001053. The reversal of 11212021001011 is 11010012021211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11212021001011 - 2¹¹ = 11212020998963 is a prime.

It is a super-2 number, since 2×11212021001011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11212021000982 and 11212021001000.

It is not an unprimeable number, because it can be changed into a prime (11212021001611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243739586956 + ... + 243739587001.

It is an arithmetic number, because the mean of its divisors is an integer number (2924875043748).

Almost surely, 2^{11212021001011} is an apocalyptic number.

11212021001011 is a deficient number, since it is larger than the sum of its proper divisors (487479173981).

11212021001011 is an equidigital number, since it uses as much as digits as its factorization.

11212021001011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487479173980.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11212021001011 its reverse (11010012021211), we get a palindrome (22222033022222).

The spelling of 11212021001011 in words is "eleven trillion, two hundred twelve billion, twenty-one million, one thousand, eleven".