1211522222222 has 8 divisors (see below), whose sum is σ = 1957074359016. Its totient is φ = 559164102552.

The previous prime is 1211522222203. The next prime is 1211522222231. The reversal of 1211522222222 is 2222222251121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (26), and also a Moran number because the ratio is a prime number: 46597008547 = 1211522222222 / (1 + 2 + 1 + 1 + 5 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2).

1211522222222 is a modest number, since divided by 2222222 gives 121152 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1211522222191 and 1211522222200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23298504248 + ... + 23298504299.

It is an arithmetic number, because the mean of its divisors is an integer number (244634294877).

Almost surely, 2^{1211522222222} is an apocalyptic number.

1211522222222 is a deficient number, since it is larger than the sum of its proper divisors (745552136794).

1211522222222 is a wasteful number, since it uses less digits than its factorization.

1211522222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46597008562.

The product of its digits is 2560, while the sum is 26.

Adding to 1211522222222 its reverse (2222222251121), we get a palindrome (3433744473343).

The spelling of 1211522222222 in words is "one trillion, two hundred eleven billion, five hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".