11111222220212 has 12 divisors (see below), whose sum is σ = 19462461660096. Its totient is φ = 5550518888760.

The previous prime is 11111222220211. The next prime is 11111222220269. The reversal of 11111222220212 is 21202222211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111222220211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1273050428 + ... + 1273059155.

It is an arithmetic number, because the mean of its divisors is an integer number (1621871805008).

Almost surely, 2^{11111222220212} is an apocalyptic number.

It is an amenable number.

11111222220212 is a deficient number, since it is larger than the sum of its proper divisors (8351239439884).

11111222220212 is a wasteful number, since it uses less digits than its factorization.

11111222220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546110678 (or 2546110676 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11111222220212 its reverse (21202222211111), we get a palindrome (32313444431323).

The spelling of 11111222220212 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twelve".