1211002222 has 4 divisors (see below), whose sum is σ = 1816503336. Its totient is φ = 605501110.

The previous prime is 1211002181. The next prime is 1211002291. The reversal of 1211002222 is 2222001121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2222001121 = 211 ⋅10530811.

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, 302750554 + ... + 302750557.

It is an arithmetic number, because the mean of its divisors is an integer number (454125834).

Almost surely, 2^1211002222 is an apocalyptic number.

1211002222 is a deficient number, since it is larger than the sum of its proper divisors (605501114).

1211002222 is an equidigital number, since it uses as much as digits as its factorization.

1211002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605501113.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1211002222 is about 34799.4572084106. The cubic root of 1211002222 is about 1065.8963621882.

Adding to 1211002222 its reverse (2222001121), we get a palindrome (3433003343).

The spelling of 1211002222 in words is "one billion, two hundred eleven million, two thousand, two hundred twenty-two".