20111222213 has 4 divisors (see below), whose sum is σ = 20124895488. Its totient is φ = 20097548940.

The previous prime is 20111222203. The next prime is 20111222233. The reversal of 20111222213 is 31222211102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31222211102 = 2 ⋅15611105551.

It is a cyclic number.

It is not a de Polignac number, because 20111222213 - 2¹² = 20111218117 is a prime.

It is a super-2 number, since 2×20111222213² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111222191 and 20111222200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111222203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6834431 + ... + 6837372.

It is an arithmetic number, because the mean of its divisors is an integer number (5031223872).

Almost surely, 2^20111222213 is an apocalyptic number.

It is an amenable number.

20111222213 is a deficient number, since it is larger than the sum of its proper divisors (13673275).

20111222213 is a wasteful number, since it uses less digits than its factorization.

20111222213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13673274.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 20111222213 its reverse (31222211102), we get a palindrome (51333433315).

The spelling of 20111222213 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, two hundred thirteen".