2121231222 has 24 divisors (see below), whose sum is σ = 5013819720. Its totient is φ = 642797280.

The previous prime is 2121231197. The next prime is 2121231223. The reversal of 2121231222 is 2221321212.

2121231222 is a `hidden beast` number, since 212 + 1 + 231 + 222 = 666.

It is a super-2 number, since 2×2121231222² = 8999243794375226568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

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

It is a junction number, because it is equal to n+sod(n) for n = 2121231195 and 2121231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121231223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5356447 + ... + 5356842.

It is an arithmetic number, because the mean of its divisors is an integer number (208909155).

Almost surely, 2^2121231222 is an apocalyptic number.

2121231222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2121231222 is an abundant number, since it is smaller than the sum of its proper divisors (2892588498).

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

2121231222 is a wasteful number, since it uses less digits than its factorization.

2121231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10713308 (or 10713305 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 2121231222 is about 46056.8260087471. The cubic root of 2121231222 is about 1284.8802993265.

Adding to 2121231222 its reverse (2221321212), we get a palindrome (4342552434).

The spelling of 2121231222 in words is "two billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-two".