1211055222 has 32 divisors (see below), whose sum is σ = 2614090752. Its totient is φ = 371823264.

The previous prime is 1211055191. The next prime is 1211055259. The reversal of 1211055222 is 2225501121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19803 + ... + 53049.

It is an arithmetic number, because the mean of its divisors is an integer number (81690336).

Almost surely, 2^1211055222 is an apocalyptic number.

1211055222 is an abundant number, since it is smaller than the sum of its proper divisors (1403035530).

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

1211055222 is a wasteful number, since it uses less digits than its factorization.

1211055222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33732.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1211055222 is about 34800.2187062093. The cubic root of 1211055222 is about 1065.9119117558.

Adding to 1211055222 its reverse (2225501121), we get a palindrome (3436556343).

The spelling of 1211055222 in words is "one billion, two hundred eleven million, fifty-five thousand, two hundred twenty-two".