1212211011121 has 8 divisors (see below), whose sum is σ = 1353165780384. Its totient is φ = 1076381869920.

The previous prime is 1212211011079. The next prime is 1212211011149. The reversal of 1212211011121 is 1211101122121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1212211011121 - 2⁷ = 1212211010993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212211011095 and 1212211011104.

It is not an unprimeable number, because it can be changed into a prime (1212211011821) by changing a digit.

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, 1281406516 + ... + 1281407461.

It is an arithmetic number, because the mean of its divisors is an integer number (169145722548).

Almost surely, 2^{1212211011121} is an apocalyptic number.

1212211011121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212211011121 is a deficient number, since it is larger than the sum of its proper divisors (140954769263).

1212211011121 is a wasteful number, since it uses less digits than its factorization.

1212211011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562814031.

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

Adding to 1212211011121 its reverse (1211101122121), we get a palindrome (2423312133242).

The spelling of 1212211011121 in words is "one trillion, two hundred twelve billion, two hundred eleven million, eleven thousand, one hundred twenty-one".