1212404042121 has 32 divisors (see below), whose sum is σ = 1707883430400. Its totient is φ = 762913261440.

The previous prime is 1212404042107. The next prime is 1212404042147.

It is a happy number.

1212404042121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1212404042121 - 2⁵ = 1212404042089 is a prime.

It is a super-2 number, since 2×1212404042121² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1212404042091 and 1212404042100.

It is not an unprimeable number, because it can be changed into a prime (1212404046121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29770645 + ... + 29811341.

It is an arithmetic number, because the mean of its divisors is an integer number (53371357200).

Almost surely, 2^{1212404042121} is an apocalyptic number.

It is an amenable number.

1212404042121 is a deficient number, since it is larger than the sum of its proper divisors (495479388279).

1212404042121 is a wasteful number, since it uses less digits than its factorization.

1212404042121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42629.

The product of its (nonzero) digits is 1024, while the sum is 24.

The spelling of 1212404042121 in words is "one trillion, two hundred twelve billion, four hundred four million, forty-two thousand, one hundred twenty-one".