11020121011 has 6 divisors (see below), whose sum is σ = 11630654412. Its totient is φ = 10440114300.

The previous prime is 11020120997. The next prime is 11020121023. The reversal of 11020121011 is 11012102011.

It is not a de Polignac number, because 11020121011 - 2⁹ = 11020120499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020121051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15262965 + ... + 15263686.

It is an arithmetic number, because the mean of its divisors is an integer number (1938442402).

Almost surely, 2^11020121011 is an apocalyptic number.

11020121011 is a deficient number, since it is larger than the sum of its proper divisors (610533401).

11020121011 is an equidigital number, since it uses as much as digits as its factorization.

11020121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30526689 (or 30526670 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11020121011 its reverse (11012102011), we get a palindrome (22032223022).

The spelling of 11020121011 in words is "eleven billion, twenty million, one hundred twenty-one thousand, eleven".