11020261213 has 4 divisors (see below), whose sum is σ = 11867973628. Its totient is φ = 10172548800.

The previous prime is 11020261211. The next prime is 11020261223. The reversal of 11020261213 is 31216202011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31216202011 = 29 ⋅1076420759.

It can be written as a sum of positive squares in 2 ways, for example, as 6957728569 + 4062532644 = 83413^2 + 63738^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020261213 - 2¹ = 11020261211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020261211) 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, 423856188 + ... + 423856213.

It is an arithmetic number, because the mean of its divisors is an integer number (2966993407).

Almost surely, 2^11020261213 is an apocalyptic number.

11020261213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

11020261213 is a deficient number, since it is larger than the sum of its proper divisors (847712415).

11020261213 is an equidigital number, since it uses as much as digits as its factorization.

11020261213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847712414.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 11020261213 its reverse (31216202011), we get a palindrome (42236463224).

The spelling of 11020261213 in words is "eleven billion, twenty million, two hundred sixty-one thousand, two hundred thirteen".