21113100403234 has 24 divisors (see below), whose sum is σ = 36874668295260. Its totient is φ = 9040007130336.

The previous prime is 21113100403229. The next prime is 21113100403261. The reversal of 21113100403234 is 43230400131112.

It can be written as a sum of positive squares in 2 ways, for example, as 21099645099225 + 13455304009 = 4593435^2 + 115997^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21113100403199 and 21113100403208.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100662217 + ... + 100871740.

Almost surely, 2^{21113100403234} is an apocalyptic number.

21113100403234 is a deficient number, since it is larger than the sum of its proper divisors (15761567892026).

21113100403234 is a wasteful number, since it uses less digits than its factorization.

21113100403234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201535042 (or 201535035 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21113100403234 its reverse (43230400131112), we get a palindrome (64343500534346).

The spelling of 21113100403234 in words is "twenty-one trillion, one hundred thirteen billion, one hundred million, four hundred three thousand, two hundred thirty-four".