1221212012119 has 32 divisors (see below), whose sum is σ = 1362352108032. Its totient is φ = 1085356800000.

The previous prime is 1221212012099. The next prime is 1221212012123. The reversal of 1221212012119 is 9112102121221.

It is not a de Polignac number, because 1221212012119 - 2⁷ = 1221212011991 is a prime.

It is a super-2 number, since 2×1221212012119² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1221212012093 and 1221212012102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221212012219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133651119 + ... + 133660255.

It is an arithmetic number, because the mean of its divisors is an integer number (42573503376).

Almost surely, 2^{1221212012119} is an apocalyptic number.

1221212012119 is a deficient number, since it is larger than the sum of its proper divisors (141140095913).

1221212012119 is a wasteful number, since it uses less digits than its factorization.

1221212012119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10567.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 1221212012119 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, twelve thousand, one hundred nineteen".