1220002122121 has 8 divisors (see below), whose sum is σ = 1347930733824. Its totient is φ = 1098313930560.

The previous prime is 1220002122103. The next prime is 1220002122137. The reversal of 1220002122121 is 1212212000221.

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 1220002122121 - 2⁵ = 1220002122089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220002122095 and 1220002122104.

It is not an unprimeable number, because it can be changed into a prime (1220002122821) 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 7 ways as a sum of consecutive naturals, for example, 1560104625 + ... + 1560105406.

It is an arithmetic number, because the mean of its divisors is an integer number (168491341728).

Almost surely, 2^{1220002122121} is an apocalyptic number.

It is an amenable number.

1220002122121 is a deficient number, since it is larger than the sum of its proper divisors (127928611703).

1220002122121 is a wasteful number, since it uses less digits than its factorization.

1220002122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120210071.

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

Adding to 1220002122121 its reverse (1212212000221), we get a palindrome (2432214122342).

The spelling of 1220002122121 in words is "one trillion, two hundred twenty billion, two million, one hundred twenty-two thousand, one hundred twenty-one".