20111011213 has 8 divisors (see below), whose sum is σ = 20290111488. Its totient is φ = 19932235344.

The previous prime is 20111011189. The next prime is 20111011247. The reversal of 20111011213 is 31211011102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111011213 - 2¹³ = 20111003021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111011193 and 20111011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111011273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44295 + ... + 205387.

It is an arithmetic number, because the mean of its divisors is an integer number (2536263936).

Almost surely, 2^20111011213 is an apocalyptic number.

It is an amenable number.

20111011213 is a deficient number, since it is larger than the sum of its proper divisors (179100275).

20111011213 is a wasteful number, since it uses less digits than its factorization.

20111011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162203.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 20111011213 its reverse (31211011102), we get a palindrome (51322022315).

The spelling of 20111011213 in words is "twenty billion, one hundred eleven million, eleven thousand, two hundred thirteen".