11101212021 has 8 divisors (see below), whose sum is σ = 14806020384. Its totient is φ = 7398605840.

The previous prime is 11101212019. The next prime is 11101212077. The reversal of 11101212021 is 12021210111.

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 11101212021 - 2¹ = 11101212019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11101211988 and 11101212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101219021) 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 7 ways as a sum of consecutive naturals, for example, 538746 + ... + 558971.

It is an arithmetic number, because the mean of its divisors is an integer number (1850752548).

Almost surely, 2^11101212021 is an apocalyptic number.

It is an amenable number.

11101212021 is a deficient number, since it is larger than the sum of its proper divisors (3704808363).

11101212021 is a wasteful number, since it uses less digits than its factorization.

11101212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101091.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11101212021 its reverse (12021210111), we get a palindrome (23122422132).

The spelling of 11101212021 in words is "eleven billion, one hundred one million, two hundred twelve thousand, twenty-one".