1212220220211 has 192 divisors, whose sum is σ = 2440375741440. Its totient is φ = 580729098240.

The previous prime is 1212220220147. The next prime is 1212220220251. The reversal of 1212220220211 is 1120220222121.

It is a happy number.

1212220220211 is a `hidden beast` number, since 1 + 2 + 12 + 220 + 220 + 211 = 666.

It is not a de Polignac number, because 1212220220211 - 2⁶ = 1212220220147 is a prime.

It is a super-3 number, since 3×1212220220211³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1212220220251) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 377754775 + ... + 377757983.

It is an arithmetic number, because the mean of its divisors is an integer number (12710290320).

Almost surely, 2^{1212220220211} is an apocalyptic number.

1212220220211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212220220211 is an abundant number, since it is smaller than the sum of its proper divisors (1228155521229).

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

1212220220211 is a wasteful number, since it uses less digits than its factorization.

1212220220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808 (or 4796 counting only the distinct ones).

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

Adding to 1212220220211 its reverse (1120220222121), we get a palindrome (2332440442332).

The spelling of 1212220220211 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty thousand, two hundred eleven".