1220050161 has 32 divisors (see below), whose sum is σ = 2019911040. Its totient is φ = 721382400.

The previous prime is 1220050159. The next prime is 1220050163. The reversal of 1220050161 is 1610500221.

It is an interprime number because it is at equal distance from previous prime (1220050159) and next prime (1220050163).

It is not a de Polignac number, because 1220050161 - 2¹ = 1220050159 is a prime.

It is a super-2 number, since 2×1220050161² = 2977044790712251842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1220050163) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37920 + ... + 62273.

It is an arithmetic number, because the mean of its divisors is an integer number (63122220).

Almost surely, 2^1220050161 is an apocalyptic number.

1220050161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1220050161 is a deficient number, since it is larger than the sum of its proper divisors (799860879).

1220050161 is a wasteful number, since it uses less digits than its factorization.

1220050161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100254 (or 100248 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1220050161 is about 34929.2164383915. The cubic root of 1220050161 is about 1068.5443743525.

Adding to 1220050161 its reverse (1610500221), we get a palindrome (2830550382).

The spelling of 1220050161 in words is "one billion, two hundred twenty million, fifty thousand, one hundred sixty-one".