21111113004 has 24 divisors (see below), whose sum is σ = 49279915440. Its totient is φ = 7034087424.

The previous prime is 21111113003. The next prime is 21111113137. The reversal of 21111113004 is 40031111112.

It is not an unprimeable number, because it can be changed into a prime (21111113003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338869 + ... + 396300.

It is an arithmetic number, because the mean of its divisors is an integer number (2053329810).

Almost surely, 2^21111113004 is an apocalyptic number.

It is an amenable number.

21111113004 is an abundant number, since it is smaller than the sum of its proper divisors (28168802436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111113004 is a wasteful number, since it uses less digits than its factorization.

21111113004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737569 (or 737567 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21111113004 its reverse (40031111112), we get a palindrome (61142224116).

It can be divided in two parts, 211111 and 13004, that added together give a triangular number (224115 = T₆₆₉).

The spelling of 21111113004 in words is "twenty-one billion, one hundred eleven million, one hundred thirteen thousand, four".