21162161171162 has 16 divisors (see below), whose sum is σ = 34629084699552. Its totient is φ = 9619138143120.

The previous prime is 21162161171113. The next prime is 21162161171167. The reversal of 21162161171162 is 26117116126112.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21162161171167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8734913 + ... + 10891419.

It is an arithmetic number, because the mean of its divisors is an integer number (2164317793722).

Almost surely, 2^{21162161171162} is an apocalyptic number.

21162161171162 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21162161171162 is a deficient number, since it is larger than the sum of its proper divisors (13466923528390).

21162161171162 is a wasteful number, since it uses less digits than its factorization.

21162161171162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602573.

The product of its digits is 12096, while the sum is 38.

Adding to 21162161171162 its reverse (26117116126112), we get a palindrome (47279277297274).

The spelling of 21162161171162 in words is "twenty-one trillion, one hundred sixty-two billion, one hundred sixty-one million, one hundred seventy-one thousand, one hundred sixty-two".