20111012213 has 8 divisors (see below), whose sum is σ = 21685816320. Its totient is φ = 18587841120.

The previous prime is 20111012197. The next prime is 20111012221. The reversal of 20111012213 is 31221011102.

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 20111012213 - 2⁴ = 20111012197 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 (20111012263) 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, 12907445 + ... + 12909002.

It is an arithmetic number, because the mean of its divisors is an integer number (2710727040).

Almost surely, 2^20111012213 is an apocalyptic number.

It is an amenable number.

20111012213 is a deficient number, since it is larger than the sum of its proper divisors (1574804107).

20111012213 is a wasteful number, since it uses less digits than its factorization.

20111012213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25816507.

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

Adding to 20111012213 its reverse (31221011102), we get a palindrome (51332023315).

The spelling of 20111012213 in words is "twenty billion, one hundred eleven million, twelve thousand, two hundred thirteen".