21113211404 has 12 divisors (see below), whose sum is σ = 39121538904. Its totient is φ = 9935628864.

The previous prime is 21113211401. The next prime is 21113211433. The reversal of 21113211404 is 40411231112.

It is not an unprimeable number, because it can be changed into a prime (21113211401) 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, 155244134 + ... + 155244269.

It is an arithmetic number, because the mean of its divisors is an integer number (3260128242).

Almost surely, 2^21113211404 is an apocalyptic number.

It is an amenable number.

21113211404 is a deficient number, since it is larger than the sum of its proper divisors (18008327500).

21113211404 is a wasteful number, since it uses less digits than its factorization.

21113211404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310488424 (or 310488422 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21113211404 its reverse (40411231112), we get a palindrome (61524442516).

The spelling of 21113211404 in words is "twenty-one billion, one hundred thirteen million, two hundred eleven thousand, four hundred four".