11100320421 has 16 divisors (see below), whose sum is σ = 15603149184. Its totient is φ = 7005487104.

The previous prime is 11100320419. The next prime is 11100320431. The reversal of 11100320421 is 12402300111.

It is not a de Polignac number, because 11100320421 - 2¹ = 11100320419 is a prime.

It is a super-2 number, since 2×11100320421² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11100320421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100320431) 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, 822556 + ... + 835941.

It is an arithmetic number, because the mean of its divisors is an integer number (975196824).

Almost surely, 2^11100320421 is an apocalyptic number.

It is an amenable number.

11100320421 is a deficient number, since it is larger than the sum of its proper divisors (4502828763).

11100320421 is a wasteful number, since it uses less digits than its factorization.

11100320421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658620.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11100320421 its reverse (12402300111), we get a palindrome (23502620532).

The spelling of 11100320421 in words is "eleven billion, one hundred million, three hundred twenty thousand, four hundred twenty-one".