21010233113 has 4 divisors (see below), whose sum is σ = 21734723940. Its totient is φ = 20285742288.

The previous prime is 21010233107. The next prime is 21010233157. The reversal of 21010233113 is 31133201012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4602672649 + 16407560464 = 67843^2 + 128092^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010233113 - 2¹⁴ = 21010216729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010233091 and 21010233100.

It is not an unprimeable number, because it can be changed into a prime (21010236113) 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, 362245370 + ... + 362245427.

It is an arithmetic number, because the mean of its divisors is an integer number (5433680985).

Almost surely, 2^21010233113 is an apocalyptic number.

It is an amenable number.

21010233113 is a deficient number, since it is larger than the sum of its proper divisors (724490827).

21010233113 is an equidigital number, since it uses as much as digits as its factorization.

21010233113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724490826.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21010233113 its reverse (31133201012), we get a palindrome (52143434125).

The spelling of 21010233113 in words is "twenty-one billion, ten million, two hundred thirty-three thousand, one hundred thirteen".