20213111011 has 8 divisors (see below), whose sum is σ = 20287481760. Its totient is φ = 20138777472.

The previous prime is 20213110997. The next prime is 20213111021. The reversal of 20213111011 is 11011131202.

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 a de Polignac number, because none of the positive numbers 2^k-20213111011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213110982 and 20213111000.

It is not an unprimeable number, because it can be changed into a prime (20213111021) 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, 1547275 + ... + 1560283.

It is an arithmetic number, because the mean of its divisors is an integer number (2535935220).

Almost surely, 2^20213111011 is an apocalyptic number.

20213111011 is a deficient number, since it is larger than the sum of its proper divisors (74370749).

20213111011 is a wasteful number, since it uses less digits than its factorization.

20213111011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18605.

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

Adding to 20213111011 its reverse (11011131202), we get a palindrome (31224242213).

The spelling of 20213111011 in words is "twenty billion, two hundred thirteen million, one hundred eleven thousand, eleven".