11020013121 has 16 divisors (see below), whose sum is σ = 15871432640. Its totient is φ = 6761050560.

The previous prime is 11020013119. The next prime is 11020013131. The reversal of 11020013121 is 12131002011.

It is not a de Polignac number, because 11020013121 - 2¹ = 11020013119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11020013097 and 11020013106.

It is not an unprimeable number, because it can be changed into a prime (11020013131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413926 + ... + 439743.

It is an arithmetic number, because the mean of its divisors is an integer number (991964540).

Almost surely, 2^11020013121 is an apocalyptic number.

It is an amenable number.

11020013121 is a deficient number, since it is larger than the sum of its proper divisors (4851419519).

11020013121 is a wasteful number, since it uses less digits than its factorization.

11020013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854016.

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

Adding to 11020013121 its reverse (12131002011), we get a palindrome (23151015132).

It can be divided in two parts, 110200 and 13121, that added together give a palindrome (123321).

The spelling of 11020013121 in words is "eleven billion, twenty million, thirteen thousand, one hundred twenty-one".