2121111222 has 32 divisors (see below), whose sum is σ = 4377203712. Its totient is φ = 684850944.

The previous prime is 2121111217. The next prime is 2121111229. The reversal of 2121111222 is 2221111212.

It is a super-2 number, since 2×2121111222² = 8998225632188666568, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121111229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11418 + ... + 66125.

It is an arithmetic number, because the mean of its divisors is an integer number (136787616).

Almost surely, 2^2121111222 is an apocalyptic number.

2121111222 is an abundant number, since it is smaller than the sum of its proper divisors (2256092490).

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

2121111222 is a wasteful number, since it uses less digits than its factorization.

2121111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77692.

The product of its digits is 32, while the sum is 15.

The square root of 2121111222 is about 46055.5232518316. The cubic root of 2121111222 is about 1284.8560699164.

Adding to 2121111222 its reverse (2221111212), we get a palindrome (4342222434).

The spelling of 2121111222 in words is "two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty-two".