120121145055 has 12 divisors (see below), whose sum is σ = 208209984840. Its totient is φ = 64064610672.

The previous prime is 120121145033. The next prime is 120121145077. The reversal of 120121145055 is 550541121021.

It is a happy number.

120121145055 is a `hidden beast` number, since 1 + 20 + 121 + 14 + 505 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (120121145033) and next prime (120121145077).

It is not a de Polignac number, because 120121145055 - 2⁶ = 120121144991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1334679345 + ... + 1334679434.

It is an arithmetic number, because the mean of its divisors is an integer number (17350832070).

Almost surely, 2^120121145055 is an apocalyptic number.

120121145055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120121145055 is a deficient number, since it is larger than the sum of its proper divisors (88088839785).

120121145055 is a wasteful number, since it uses less digits than its factorization.

120121145055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2669358790 (or 2669358787 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

Adding to 120121145055 its reverse (550541121021), we get a palindrome (670662266076).

The spelling of 120121145055 in words is "one hundred twenty billion, one hundred twenty-one million, one hundred forty-five thousand, fifty-five".