120021121123 has 2 divisors, whose sum is σ = 120021121124. Its totient is φ = 120021121122.

The previous prime is 120021121111. The next prime is 120021121153. The reversal of 120021121123 is 321121120021.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120021121123 is a prime.

It is a super-2 number, since 2×120021121123² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 120021121097 and 120021121106.

It is not a weakly prime, because it can be changed into another prime (120021121153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60010560561 + 60010560562.

It is an arithmetic number, because the mean of its divisors is an integer number (60010560562).

Almost surely, 2^120021121123 is an apocalyptic number.

120021121123 is a deficient number, since it is larger than the sum of its proper divisors (1).

120021121123 is an equidigital number, since it uses as much as digits as its factorization.

120021121123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 120021121123 its reverse (321121120021), we get a palindrome (441142241144).

The spelling of 120021121123 in words is "one hundred twenty billion, twenty-one million, one hundred twenty-one thousand, one hundred twenty-three".