2120405045155 has 16 divisors (see below), whose sum is σ = 2568797431200. Its totient is φ = 1680128179200.

The previous prime is 2120405045141. The next prime is 2120405045177. The reversal of 2120405045155 is 5515405040212.

It is not a de Polignac number, because 2120405045155 - 2¹³ = 2120405036963 is a prime.

It is a super-2 number, since 2×2120405045155² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120405045155.

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, 717555 + ... + 2180755.

It is an arithmetic number, because the mean of its divisors is an integer number (160549839450).

Almost surely, 2^{2120405045155} is an apocalyptic number.

2120405045155 is a deficient number, since it is larger than the sum of its proper divisors (448392386045).

2120405045155 is a wasteful number, since it uses less digits than its factorization.

2120405045155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465974.

The product of its (nonzero) digits is 40000, while the sum is 34.

The spelling of 2120405045155 in words is "two trillion, one hundred twenty billion, four hundred five million, forty-five thousand, one hundred fifty-five".