1211021222 has 4 divisors (see below), whose sum is σ = 1816531836. Its totient is φ = 605510610.

The previous prime is 1211021213. The next prime is 1211021239. The reversal of 1211021222 is 2221201121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2221201121 = 17581 ⋅126341.

It is a junction number, because it is equal to n+sod(n) for n = 1211021197 and 1211021206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302755304 + ... + 302755307.

It is an arithmetic number, because the mean of its divisors is an integer number (454132959).

Almost surely, 2^1211021222 is an apocalyptic number.

1211021222 is a deficient number, since it is larger than the sum of its proper divisors (605510614).

1211021222 is an equidigital number, since it uses as much as digits as its factorization.

1211021222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605510613.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 1211021222 is about 34799.7302001036. The cubic root of 1211021222 is about 1065.9019366136.

Adding to 1211021222 its reverse (2221201121), we get a palindrome (3432222343).

The spelling of 1211021222 in words is "one billion, two hundred eleven million, twenty-one thousand, two hundred twenty-two".