21120435411 has 32 divisors (see below), whose sum is σ = 29033012736. Its totient is φ = 13648800000.

The previous prime is 21120435403. The next prime is 21120435421. The reversal of 21120435411 is 11453402112.

It is not a de Polignac number, because 21120435411 - 2³ = 21120435403 is a prime.

It is a super-3 number, since 3×21120435411³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21120435421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22444201 + ... + 22445141.

It is an arithmetic number, because the mean of its divisors is an integer number (907281648).

Almost surely, 2^21120435411 is an apocalyptic number.

21120435411 is a deficient number, since it is larger than the sum of its proper divisors (7912577325).

21120435411 is a wasteful number, since it uses less digits than its factorization.

21120435411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21120435411 its reverse (11453402112), we get a palindrome (32573837523).

The spelling of 21120435411 in words is "twenty-one billion, one hundred twenty million, four hundred thirty-five thousand, four hundred eleven".