1212002121 has 32 divisors (see below), whose sum is σ = 1803294720. Its totient is φ = 717912000.

The previous prime is 1212002117. The next prime is 1212002149.

1212002121 is nontrivially palindromic in base 10.

1212002121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1212002121 - 2² = 1212002117 is a prime.

1212002121 is a modest number, since divided by 2121 gives 1212 as remainder.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1212002097 and 1212002106.

It is not an unprimeable number, because it can be changed into a prime (1212002111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261006 + ... + 265608.

It is an arithmetic number, because the mean of its divisors is an integer number (56352960).

Almost surely, 2^1212002121 is an apocalyptic number.

1212002121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212002121 is a deficient number, since it is larger than the sum of its proper divisors (591292599).

1212002121 is a wasteful number, since it uses less digits than its factorization.

1212002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4797.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1212002121 is about 34813.8208331117. The cubic root of 1212002121 is about 1066.1896442011.

It can be divided in two parts, 121200 and 2121, that added together give a palindrome (123321).

The spelling of 1212002121 in words is "one billion, two hundred twelve million, two thousand, one hundred twenty-one".