1220002120123 has 2 divisors, whose sum is σ = 1220002120124. Its totient is φ = 1220002120122.

The previous prime is 1220002120121. The next prime is 1220002120153. The reversal of 1220002120123 is 3210212000221.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1220002120123 - 2¹ = 1220002120121 is a prime.

It is a super-2 number, since 2×1220002120123² (a number of 25 digits) contains 22 as substring.

Together with 1220002120121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220002120097 and 1220002120106.

It is not a weakly prime, because it can be changed into another prime (1220002120121) 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 as a sum of consecutive naturals, namely, 610001060061 + 610001060062.

It is an arithmetic number, because the mean of its divisors is an integer number (610001060062).

Almost surely, 2^{1220002120123} is an apocalyptic number.

1220002120123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220002120123 is an equidigital number, since it uses as much as digits as its factorization.

1220002120123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1220002120123 its reverse (3210212000221), we get a palindrome (4430214120344).

The spelling of 1220002120123 in words is "one trillion, two hundred twenty billion, two million, one hundred twenty thousand, one hundred twenty-three".