12101221170 has 24 divisors (see below), whose sum is σ = 31463175276. Its totient is φ = 3226992288.

The previous prime is 12101221117. The next prime is 12101221193. The reversal of 12101221170 is 7112210121.

It can be written as a sum of positive squares in 2 ways, for example, as 12063287889 + 37933281 = 109833^2 + 6159^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67228917 + ... + 67229096.

Almost surely, 2^12101221170 is an apocalyptic number.

12101221170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12101221170 is an abundant number, since it is smaller than the sum of its proper divisors (19361954106).

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

12101221170 is a wasteful number, since it uses less digits than its factorization.

12101221170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134458026 (or 134458023 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 18.

Adding to 12101221170 its reverse (7112210121), we get a palindrome (19213431291).

The spelling of 12101221170 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, one hundred seventy".