1212111000121 has 8 divisors (see below), whose sum is σ = 1385371167680. Its totient is φ = 1038876195888.

The previous prime is 1212111000103. The next prime is 1212111000211. The reversal of 1212111000121 is 1210001112121.

It is a happy number.

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 1212111000121 - 2¹⁷ = 1212110869049 is a prime.

It is a super-2 number, since 2×1212111000121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212111040121) 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, 6238311 + ... + 6429676.

It is an arithmetic number, because the mean of its divisors is an integer number (173171395960).

Almost surely, 2^{1212111000121} is an apocalyptic number.

It is an amenable number.

1212111000121 is a deficient number, since it is larger than the sum of its proper divisors (173260167559).

1212111000121 is a wasteful number, since it uses less digits than its factorization.

1212111000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12681663.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1212111000121 its reverse (1210001112121), we get a palindrome (2422112112242).

The spelling of 1212111000121 in words is "one trillion, two hundred twelve billion, one hundred eleven million, one hundred twenty-one", and thus it is an aban number.