120611655556021 has 16 divisors (see below), whose sum is σ = 138131193877504. Its totient is φ = 103164600115584.

The previous prime is 120611655555997. The next prime is 120611655556111. The reversal of 120611655556021 is 120655556116021.

It is not a de Polignac number, because 120611655556021 - 2³¹ = 120609508072373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120611655557021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2637505 + ... + 15753721.

It is an arithmetic number, because the mean of its divisors is an integer number (8633199617344).

Almost surely, 2^{120611655556021} is an apocalyptic number.

It is an amenable number.

120611655556021 is a deficient number, since it is larger than the sum of its proper divisors (17519538321483).

120611655556021 is a wasteful number, since it uses less digits than its factorization.

120611655556021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13118980.

The product of its (nonzero) digits is 540000, while the sum is 46.

The spelling of 120611655556021 in words is "one hundred twenty trillion, six hundred eleven billion, six hundred fifty-five million, five hundred fifty-six thousand, twenty-one".