20011021100213 has 24 divisors (see below), whose sum is σ = 24026142737376. Its totient is φ = 16517178849600.

The previous prime is 20011021100197. The next prime is 20011021100227. The reversal of 20011021100213 is 31200112011002.

It is not a de Polignac number, because 20011021100213 - 2⁴ = 20011021100197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011021100243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88119395 + ... + 88346192.

It is an arithmetic number, because the mean of its divisors is an integer number (1001089280724).

Almost surely, 2^{20011021100213} is an apocalyptic number.

It is an amenable number.

20011021100213 is a deficient number, since it is larger than the sum of its proper divisors (4015121637163).

20011021100213 is a wasteful number, since it uses less digits than its factorization.

20011021100213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176465685 (or 176465672 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20011021100213 its reverse (31200112011002), we get a palindrome (51211133111215).

The spelling of 20011021100213 in words is "twenty trillion, eleven billion, twenty-one million, one hundred thousand, two hundred thirteen".