1212222001212 has 24 divisors (see below), whose sum is σ = 3142797781200. Its totient is φ = 404074000368.

The previous prime is 1212222001171. The next prime is 1212222001219. The reversal of 1212222001212 is 2121002222121.

It is a happy number.

1212222001212 is a `hidden beast` number, since 121 + 222 + 200 + 121 + 2 = 666.

It is a super-2 number, since 2×1212222001212² (a number of 25 digits) contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212222001219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5612138787 + ... + 5612139002.

It is an arithmetic number, because the mean of its divisors is an integer number (130949907550).

Almost surely, 2^{1212222001212} is an apocalyptic number.

1212222001212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212222001212 is an abundant number, since it is smaller than the sum of its proper divisors (1930575779988).

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

1212222001212 is a wasteful number, since it uses less digits than its factorization.

1212222001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11224277802 (or 11224277794 counting only the distinct ones).

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

Adding to 1212222001212 its reverse (2121002222121), we get a palindrome (3333224223333).

The spelling of 1212222001212 in words is "one trillion, two hundred twelve billion, two hundred twenty-two million, one thousand, two hundred twelve".