2121162166563 has 32 divisors (see below), whose sum is σ = 3143815898112. Its totient is φ = 1261186617600.

The previous prime is 2121162166561. The next prime is 2121162166633. The reversal of 2121162166563 is 3656612611212.

It is not a de Polignac number, because 2121162166563 - 2¹ = 2121162166561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121162166561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22702623 + ... + 22795863.

It is an arithmetic number, because the mean of its divisors is an integer number (98244246816).

Almost surely, 2^{2121162166563} is an apocalyptic number.

2121162166563 is a deficient number, since it is larger than the sum of its proper divisors (1022653731549).

2121162166563 is a wasteful number, since it uses less digits than its factorization.

2121162166563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106315.

The product of its digits is 155520, while the sum is 42.

Adding to 2121162166563 its reverse (3656612611212), we get a palindrome (5777774777775).

The spelling of 2121162166563 in words is "two trillion, one hundred twenty-one billion, one hundred sixty-two million, one hundred sixty-six thousand, five hundred sixty-three".