1211100220222 has 32 divisors (see below), whose sum is σ = 1907854663680. Its totient is φ = 575493636960.

The previous prime is 1211100220193. The next prime is 1211100220223. The reversal of 1211100220222 is 2220220011121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211100220196 and 1211100220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211100220223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9662083 + ... + 9786625.

It is an arithmetic number, because the mean of its divisors is an integer number (59620458240).

Almost surely, 2^{1211100220222} is an apocalyptic number.

1211100220222 is a deficient number, since it is larger than the sum of its proper divisors (696754443458).

1211100220222 is a wasteful number, since it uses less digits than its factorization.

1211100220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125928.

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

Adding to 1211100220222 its reverse (2220220011121), we get a palindrome (3431320231343).

The spelling of 1211100220222 in words is "one trillion, two hundred eleven billion, one hundred million, two hundred twenty thousand, two hundred twenty-two".