1211100022222 has 4 divisors (see below), whose sum is σ = 1816650033336. Its totient is φ = 605550011110.

The previous prime is 1211100022219. The next prime is 1211100022241. The reversal of 1211100022222 is 2222200011121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1211100022222² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1211100022196 and 1211100022205.

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, 302775005554 + ... + 302775005557.

It is an arithmetic number, because the mean of its divisors is an integer number (454162508334).

Almost surely, 2^{1211100022222} is an apocalyptic number.

1211100022222 is a deficient number, since it is larger than the sum of its proper divisors (605550011114).

1211100022222 is an equidigital number, since it uses as much as digits as its factorization.

1211100022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605550011113.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1211100022222 its reverse (2222200011121), we get a palindrome (3433300033343).

The spelling of 1211100022222 in words is "one trillion, two hundred eleven billion, one hundred million, twenty-two thousand, two hundred twenty-two".