1212011121012 has 24 divisors (see below), whose sum is σ = 2828513618112. Its totient is φ = 403934040000.

The previous prime is 1212011121001. The next prime is 1212011121023. The reversal of 1212011121012 is 2101211102121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1212011121001) and next prime (1212011121023).

It is a junction number, because it is equal to n+sod(n) for n = 1212011120982 and 1212011121000.

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 7 ways as a sum of consecutive naturals, for example, 8635864 + ... + 8775087.

It is an arithmetic number, because the mean of its divisors is an integer number (117854734088).

Almost surely, 2^{1212011121012} is an apocalyptic number.

1212011121012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1212011121012 is an abundant number, since it is smaller than the sum of its proper divisors (1616502497100).

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

1212011121012 is a wasteful number, since it uses less digits than its factorization.

1212011121012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17416759 (or 17416757 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1212011121012 its reverse (2101211102121), we get a palindrome (3313222223133).

The spelling of 1212011121012 in words is "one trillion, two hundred twelve billion, eleven million, one hundred twenty-one thousand, twelve".