11221121012001 has 4 divisors (see below), whose sum is σ = 14961494682672. Its totient is φ = 7480747341332.

The previous prime is 11221121011979. The next prime is 11221121012009. The reversal of 11221121012001 is 10021012112211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11221121012001 - 2²¹ = 11221118914849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11221121012009) 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, 1870186835331 + ... + 1870186835336.

It is an arithmetic number, because the mean of its divisors is an integer number (3740373670668).

Almost surely, 2^{11221121012001} is an apocalyptic number.

It is an amenable number.

11221121012001 is a deficient number, since it is larger than the sum of its proper divisors (3740373670671).

11221121012001 is an equidigital number, since it uses as much as digits as its factorization.

11221121012001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3740373670670.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11221121012001 its reverse (10021012112211), we get a palindrome (21242133124212).

The spelling of 11221121012001 in words is "eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, twelve thousand, one".