1210120010655 has 16 divisors (see below), whose sum is σ = 1936730982240. Its totient is φ = 645217683968.

The previous prime is 1210120010599. The next prime is 1210120010689. The reversal of 1210120010655 is 5560100210121.

It is a cyclic number.

It is not a de Polignac number, because 1210120010655 - 2¹⁴ = 1210119994271 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11172750 + ... + 11280539.

It is an arithmetic number, because the mean of its divisors is an integer number (121045686390).

Almost surely, 2^{1210120010655} is an apocalyptic number.

1210120010655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1210120010655 is a deficient number, since it is larger than the sum of its proper divisors (726610971585).

1210120010655 is a wasteful number, since it uses less digits than its factorization.

1210120010655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22456890.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 1210120010655 its reverse (5560100210121), we get a palindrome (6770220220776).

The spelling of 1210120010655 in words is "one trillion, two hundred ten billion, one hundred twenty million, ten thousand, six hundred fifty-five".