1121220220212 has 72 divisors (see below), whose sum is σ = 2851226737632. Its totient is φ = 371496196800.

The previous prime is 1121220220201. The next prime is 1121220220261. The reversal of 1121220220212 is 2120220221211.

It is a happy number.

1121220220212 is a `hidden beast` number, since 1 + 1 + 212 + 20 + 220 + 212 = 666.

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 23 ways as a sum of consecutive naturals, for example, 13845223 + ... + 13925969.

It is an arithmetic number, because the mean of its divisors is an integer number (39600371356).

Almost surely, 2^{1121220220212} is an apocalyptic number.

1121220220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121220220212 is an abundant number, since it is smaller than the sum of its proper divisors (1730006517420).

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

1121220220212 is a wasteful number, since it uses less digits than its factorization.

1121220220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83069 (or 83064 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1121220220212 its reverse (2120220221211), we get a palindrome (3241440441423).

Subtracting 1121220220212 from its reverse (2120220221211), we obtain a palindrome (999000000999).

The spelling of 1121220220212 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty thousand, two hundred twelve".