2120155665168 has 80 divisors (see below), whose sum is σ = 5921155555520. Its totient is φ = 651427619328.

The previous prime is 2120155665041. The next prime is 2120155665241. The reversal of 2120155665168 is 8615665510212.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31381555 + ... + 31449042.

It is an arithmetic number, because the mean of its divisors is an integer number (74014444444).

Almost surely, 2^{2120155665168} is an apocalyptic number.

It is an amenable number.

2120155665168 is an abundant number, since it is smaller than the sum of its proper divisors (3800999890352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2120155665168 is a wasteful number, since it uses less digits than its factorization.

2120155665168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62830664 (or 62830658 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 2120155665168 in words is "two trillion, one hundred twenty billion, one hundred fifty-five million, six hundred sixty-five thousand, one hundred sixty-eight".