21101031232213 has 16 divisors (see below), whose sum is σ = 22101760558080. Its totient is φ = 20107293807744.

The previous prime is 21101031232201. The next prime is 21101031232223. The reversal of 21101031232213 is 31223213010112.

It is a cyclic number.

It is not a de Polignac number, because 21101031232213 - 2³³ = 21092441297621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101031232223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17747545 + ... + 18899137.

It is an arithmetic number, because the mean of its divisors is an integer number (1381360034880).

Almost surely, 2^{21101031232213} is an apocalyptic number.

21101031232213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21101031232213 is a deficient number, since it is larger than the sum of its proper divisors (1000729325867).

21101031232213 is a wasteful number, since it uses less digits than its factorization.

21101031232213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154628.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21101031232213 its reverse (31223213010112), we get a palindrome (52324244242325).

The spelling of 21101031232213 in words is "twenty-one trillion, one hundred one billion, thirty-one million, two hundred thirty-two thousand, two hundred thirteen".