1212121202002 has 16 divisors (see below), whose sum is σ = 1837531687320. Its totient is φ = 599614760448.

The previous prime is 1212121201987. The next prime is 1212121202029. The reversal of 1212121202002 is 2002021212121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1022102802081 + 190018399921 = 1010991^2 + 435911^2 .

It is an unprimeable number.

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, 439477 + ... + 1617832.

Almost surely, 2^{1212121202002} is an apocalyptic number.

1212121202002 is a deficient number, since it is larger than the sum of its proper divisors (625410485318).

1212121202002 is a wasteful number, since it uses less digits than its factorization.

1212121202002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060445.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1212121202002 its reverse (2002021212121), we get a palindrome (3214142414123).

The spelling of 1212121202002 in words is "one trillion, two hundred twelve billion, one hundred twenty-one million, two hundred two thousand, two".