11101212021001 has 2 divisors, whose sum is σ = 11101212021002. Its totient is φ = 11101212021000.

The previous prime is 11101212020999. The next prime is 11101212021013. The reversal of 11101212021001 is 10012021210111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9075614155776 + 2025597865225 = 3012576^2 + 1423235^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101212021001 - 2¹ = 11101212020999 is a prime.

Together with 11101212020999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (11101212021401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550606010500 + 5550606010501.

It is an arithmetic number, because the mean of its divisors is an integer number (5550606010501).

Almost surely, 2^{11101212021001} is an apocalyptic number.

It is an amenable number.

11101212021001 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101212021001 is an equidigital number, since it uses as much as digits as its factorization.

11101212021001 is an evil number, because the sum of its binary digits is even.

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

Adding to 11101212021001 its reverse (10012021210111), we get a palindrome (21113233231112).

The spelling of 11101212021001 in words is "eleven trillion, one hundred one billion, two hundred twelve million, twenty-one thousand, one".