21111006234 has 32 divisors (see below), whose sum is σ = 42345009216. Its totient is φ = 7016526720.

The previous prime is 21111006227. The next prime is 21111006253. The reversal of 21111006234 is 43260011112.

It is a self number, because there is not a number n which added to its sum of digits gives 21111006234.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7009789 + ... + 7012799.

It is an arithmetic number, because the mean of its divisors is an integer number (1323281538).

Almost surely, 2^21111006234 is an apocalyptic number.

21111006234 is an abundant number, since it is smaller than the sum of its proper divisors (21234002982).

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

21111006234 is a wasteful number, since it uses less digits than its factorization.

21111006234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21111006234 its reverse (43260011112), we get a palindrome (64371017346).

The spelling of 21111006234 in words is "twenty-one billion, one hundred eleven million, six thousand, two hundred thirty-four".