1212210220212 has 72 divisors (see below), whose sum is σ = 3190392775752. Its totient is φ = 387752140800.

The previous prime is 1212210220189. The next prime is 1212210220223. The reversal of 1212210220212 is 2120220122121.

It is a happy number.

1212210220212 is a `hidden beast` number, since 1 + 21 + 2 + 210 + 220 + 212 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15536126736 + 1196674093476 = 124644^2 + 1093926^2 .

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6641773 + ... + 6821844.

Almost surely, 2^{1212210220212} is an apocalyptic number.

1212210220212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212210220212 is an abundant number, since it is smaller than the sum of its proper divisors (1978182555540).

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

1212210220212 is a wasteful number, since it uses less digits than its factorization.

1212210220212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13463729 (or 13463724 counting only the distinct ones).

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

Adding to 1212210220212 its reverse (2120220122121), we get a palindrome (3332430342333).

The spelling of 1212210220212 in words is "one trillion, two hundred twelve billion, two hundred ten million, two hundred twenty thousand, two hundred twelve".