11011212321321 has 16 divisors (see below), whose sum is σ = 15141341118464. Its totient is φ = 7113634318224.

The previous prime is 11011212321287. The next prime is 11011212321337. The reversal of 11011212321321 is 12312321211011.

It is not a de Polignac number, because 11011212321321 - 2⁹ = 11011212320809 is a prime.

It is a super-2 number, since 2×11011212321321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011212321341) 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, 336039661 + ... + 336072426.

It is an arithmetic number, because the mean of its divisors is an integer number (946333819904).

Almost surely, 2^{11011212321321} is an apocalyptic number.

It is an amenable number.

11011212321321 is a deficient number, since it is larger than the sum of its proper divisors (4130128797143).

11011212321321 is a wasteful number, since it uses less digits than its factorization.

11011212321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672112260.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11011212321321 its reverse (12312321211011), we get a palindrome (23323533532332).

The spelling of 11011212321321 in words is "eleven trillion, eleven billion, two hundred twelve million, three hundred twenty-one thousand, three hundred twenty-one".