1212002100121 has 8 divisors (see below), whose sum is σ = 1221570478080. Its totient is φ = 1202434113888.

The previous prime is 1212002100083. The next prime is 1212002100149. The reversal of 1212002100121 is 1210012002121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212002100121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212002100151) 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, 11627925 + ... + 11731693.

It is an arithmetic number, because the mean of its divisors is an integer number (152696309760).

Almost surely, 2^{1212002100121} is an apocalyptic number.

It is an amenable number.

1212002100121 is a deficient number, since it is larger than the sum of its proper divisors (9568377959).

1212002100121 is a wasteful number, since it uses less digits than its factorization.

1212002100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195863.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212002100121 its reverse (1210012002121), we get a palindrome (2422014102242).

The spelling of 1212002100121 in words is "one trillion, two hundred twelve billion, two million, one hundred thousand, one hundred twenty-one".