11421111562121 has 4 divisors (see below), whose sum is σ = 11453836810500. Its totient is φ = 11388386313744.

The previous prime is 11421111562097. The next prime is 11421111562151. The reversal of 11421111562121 is 12126511112411.

It is a happy number.

11421111562121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4179571360000 + 7241540202121 = 2044400^2 + 2691011^2 .

It is a cyclic number.

It is not a de Polignac number, because 11421111562121 - 2⁶ = 11421111562057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11421111562151) 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, 16362623666 + ... + 16362624363.

It is an arithmetic number, because the mean of its divisors is an integer number (2863459202625).

Almost surely, 2^{11421111562121} is an apocalyptic number.

It is an amenable number.

11421111562121 is a deficient number, since it is larger than the sum of its proper divisors (32725248379).

11421111562121 is an equidigital number, since it uses as much as digits as its factorization.

11421111562121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32725248378.

The product of its digits is 960, while the sum is 29.

Adding to 11421111562121 its reverse (12126511112411), we get a palindrome (23547622674532).

The spelling of 11421111562121 in words is "eleven trillion, four hundred twenty-one billion, one hundred eleven million, five hundred sixty-two thousand, one hundred twenty-one".