1220166141 has 4 divisors (see below), whose sum is σ = 1626888192. Its totient is φ = 813444092.

The previous prime is 1220166133. The next prime is 1220166161. The reversal of 1220166141 is 1416610221.

It is a happy number.

1220166141 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1220166141 - 2³ = 1220166133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220166121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203361021 + ... + 203361026.

It is an arithmetic number, because the mean of its divisors is an integer number (406722048).

Almost surely, 2^1220166141 is an apocalyptic number.

It is an amenable number.

1220166141 is a deficient number, since it is larger than the sum of its proper divisors (406722051).

1220166141 is an equidigital number, since it uses as much as digits as its factorization.

1220166141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406722050.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1220166141 is about 34930.8766136780. The cubic root of 1220166141 is about 1068.5782324822.

Adding to 1220166141 its reverse (1416610221), we get a palindrome (2636776362).

The spelling of 1220166141 in words is "one billion, two hundred twenty million, one hundred sixty-six thousand, one hundred forty-one".