120121202020111 has 2 divisors, whose sum is σ = 120121202020112. Its totient is φ = 120121202020110.

The previous prime is 120121202020097. The next prime is 120121202020147. The reversal of 120121202020111 is 111020202121021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 120121202020111 - 2²⁷ = 120121067802383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120121202020511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60060601010055 + 60060601010056.

It is an arithmetic number, because the mean of its divisors is an integer number (60060601010056).

Almost surely, 2^{120121202020111} is an apocalyptic number.

120121202020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

120121202020111 is an equidigital number, since it uses as much as digits as its factorization.

120121202020111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 120121202020111 its reverse (111020202121021), we get a palindrome (231141404141132).

The spelling of 120121202020111 in words is "one hundred twenty trillion, one hundred twenty-one billion, two hundred two million, twenty thousand, one hundred eleven".