1220142105 has 144 divisors (see below), whose sum is σ = 2767774464. Its totient is φ = 484116480.

The previous prime is 1220142103. The next prime is 1220142107. The reversal of 1220142105 is 5012410221.

It is an interprime number because it is at equal distance from previous prime (1220142103) and next prime (1220142107).

It is not a de Polignac number, because 1220142105 - 2¹ = 1220142103 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 (1220142103) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1182940 + ... + 1183970.

It is an arithmetic number, because the mean of its divisors is an integer number (19220656).

Almost surely, 2^1220142105 is an apocalyptic number.

1220142105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1220142105 is an abundant number, since it is smaller than the sum of its proper divisors (1547632359).

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

1220142105 is a wasteful number, since it uses less digits than its factorization.

1220142105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1220142105 is about 34930.5325610704. The cubic root of 1220142105 is about 1068.5712158107.

Adding to 1220142105 its reverse (5012410221), we get a palindrome (6232552326).

The spelling of 1220142105 in words is "one billion, two hundred twenty million, one hundred forty-two thousand, one hundred five".