20111222334 has 64 divisors (see below), whose sum is σ = 48468787200. Its totient is φ = 5434540128.

The previous prime is 20111222323. The next prime is 20111222389. The reversal of 20111222334 is 43322211102.

It is a super-2 number, since 2×20111222334² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20111222334.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463627 + ... + 505145.

It is an arithmetic number, because the mean of its divisors is an integer number (757324800).

Almost surely, 2^20111222334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20111222334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24234393600).

20111222334 is an abundant number, since it is smaller than the sum of its proper divisors (28357564866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20111222334 is a wasteful number, since it uses less digits than its factorization.

20111222334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42157.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 20111222334 its reverse (43322211102), we get a palindrome (63433433436).

It can be divided in two parts, 201112 and 22334, that added together give a triangular number (223446 = T₆₆₈).

The spelling of 20111222334 in words is "twenty billion, one hundred eleven million, two hundred twenty-two thousand, three hundred thirty-four".