1211445222 has 32 divisors (see below), whose sum is σ = 2636182752. Its totient is φ = 368907264.

The previous prime is 1211445203. The next prime is 1211445223. The reversal of 1211445222 is 2225441121.

1211445222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×1211445222³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211445192 and 1211445201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211445223) 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, 72493 + ... + 87624.

It is an arithmetic number, because the mean of its divisors is an integer number (82380711).

Almost surely, 2^1211445222 is an apocalyptic number.

1211445222 is an abundant number, since it is smaller than the sum of its proper divisors (1424737530).

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

1211445222 is a wasteful number, since it uses less digits than its factorization.

1211445222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160232.

The product of its digits is 1280, while the sum is 24.

The square root of 1211445222 is about 34805.8216682210. The cubic root of 1211445222 is about 1066.0263191537.

Adding to 1211445222 its reverse (2225441121), we get a palindrome (3436886343).

The spelling of 1211445222 in words is "one billion, two hundred eleven million, four hundred forty-five thousand, two hundred twenty-two".