1221130134 has 64 divisors (see below), whose sum is σ = 3115046400. Its totient is φ = 347346144.

The previous prime is 1221130121. The next prime is 1221130153. The reversal of 1221130134 is 4310311221.

1221130134 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79509 + ... + 93615.

It is an arithmetic number, because the mean of its divisors is an integer number (48672600).

Almost surely, 2^1221130134 is an apocalyptic number.

1221130134 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1221130134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1557523200).

1221130134 is an abundant number, since it is smaller than the sum of its proper divisors (1893916266).

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

1221130134 is a wasteful number, since it uses less digits than its factorization.

1221130134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14354 (or 14348 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1221130134 is about 34944.6724694910. The cubic root of 1221130134 is about 1068.8595686989.

Adding to 1221130134 its reverse (4310311221), we get a palindrome (5531441355).

It can be divided in two parts, 122 and 1130134, that added together give a triangular number (1130256 = T₁₅₀₃).

The spelling of 1221130134 in words is "one billion, two hundred twenty-one million, one hundred thirty thousand, one hundred thirty-four".