1111122220212 has 54 divisors (see below), whose sum is σ = 2886631807878. Its totient is φ = 360363947328.

The previous prime is 1111122220199. The next prime is 1111122220259. The reversal of 1111122220212 is 2120222211111.

1111122220212 is a `hidden beast` number, since 1 + 111 + 122 + 220 + 212 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 554018216976 + 557104003236 = 744324^2 + 746394^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11223363 + ... + 11321930.

Almost surely, 2^{1111122220212} is an apocalyptic number.

1111122220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1111122220212 is an abundant number, since it is smaller than the sum of its proper divisors (1775509587666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111122220212 is a wasteful number, since it uses less digits than its factorization.

1111122220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22545377 (or 22545335 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 1111122220212 its reverse (2120222211111), we get a palindrome (3231344431323).

The spelling of 1111122220212 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twelve".