11021255213 has 4 divisors (see below), whose sum is σ = 11025739680. Its totient is φ = 11016770748.

The previous prime is 11021255171. The next prime is 11021255233. The reversal of 11021255213 is 31255212011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31255212011 = 17 ⋅1838541883.

It is a cyclic number.

It is not a de Polignac number, because 11021255213 - 2¹⁶ = 11021189677 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 (11021255233) 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, 2238545 + ... + 2243462.

It is an arithmetic number, because the mean of its divisors is an integer number (2756434920).

Almost surely, 2^11021255213 is an apocalyptic number.

It is an amenable number.

11021255213 is a deficient number, since it is larger than the sum of its proper divisors (4484467).

11021255213 is an equidigital number, since it uses as much as digits as its factorization.

11021255213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4484466.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 11021255213 its reverse (31255212011), we get a palindrome (42276467224).

The spelling of 11021255213 in words is "eleven billion, twenty-one million, two hundred fifty-five thousand, two hundred thirteen".