2052121201555 has 4 divisors (see below), whose sum is σ = 2462545441872. Its totient is φ = 1641696961240.

The previous prime is 2052121201541. The next prime is 2052121201561. The reversal of 2052121201555 is 5551021212502.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2052121201555 - 2²⁵ = 2052087647123 is a prime.

It is a super-2 number, since 2×2052121201555² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205212120151 + ... + 205212120160.

It is an arithmetic number, because the mean of its divisors is an integer number (615636360468).

Almost surely, 2^{2052121201555} is an apocalyptic number.

2052121201555 is a deficient number, since it is larger than the sum of its proper divisors (410424240317).

2052121201555 is an equidigital number, since it uses as much as digits as its factorization.

2052121201555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410424240316.

The product of its (nonzero) digits is 10000, while the sum is 31.

The spelling of 2052121201555 in words is "two trillion, fifty-two billion, one hundred twenty-one million, two hundred one thousand, five hundred fifty-five".