120210011999956 has 24 divisors (see below), whose sum is σ = 222746095008360. Its totient is φ = 56568397996032.

The previous prime is 120210011999951. The next prime is 120210011999963. The reversal of 120210011999956 is 659999110012021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4235635660356 + 115974376339600 = 2058066^2 + 10769140^2 .

It is a junction number, because it is equal to n+sod(n) for n = 120210011999897 and 120210011999906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120210011999951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12120525 + ... + 19680628.

It is an arithmetic number, because the mean of its divisors is an integer number (9281087292015).

Almost surely, 2^{120210011999956} is an apocalyptic number.

It is an amenable number.

120210011999956 is a deficient number, since it is larger than the sum of its proper divisors (102536083008404).

120210011999956 is a wasteful number, since it uses less digits than its factorization.

120210011999956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31856763 (or 31856761 counting only the distinct ones).

The product of its (nonzero) digits is 787320, while the sum is 55.

The spelling of 120210011999956 in words is "one hundred twenty trillion, two hundred ten billion, eleven million, nine hundred ninety-nine thousand, nine hundred fifty-six".