120213665655 has 32 divisors (see below), whose sum is σ = 192790160640. Its totient is φ = 63964680960.

The previous prime is 120213665633. The next prime is 120213665659. The reversal of 120213665655 is 556566312021.

It is not a de Polignac number, because 120213665655 - 2⁵ = 120213665623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120213665659) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15975724 + ... + 15983246.

It is an arithmetic number, because the mean of its divisors is an integer number (6024692520).

Almost surely, 2^120213665655 is an apocalyptic number.

120213665655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120213665655 is a deficient number, since it is larger than the sum of its proper divisors (72576494985).

120213665655 is a wasteful number, since it uses less digits than its factorization.

120213665655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9871.

The product of its (nonzero) digits is 324000, while the sum is 42.

Adding to 120213665655 its reverse (556566312021), we get a palindrome (676779977676).

The spelling of 120213665655 in words is "one hundred twenty billion, two hundred thirteen million, six hundred sixty-five thousand, six hundred fifty-five".