1223121130 has 64 divisors (see below), whose sum is σ = 2753740800. Its totient is φ = 380001600.

The previous prime is 1223121127. The next prime is 1223121131. The reversal of 1223121130 is 311213221.

It is not an unprimeable number, because it can be changed into a prime (1223121131) 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, 252471 + ... + 257269.

It is an arithmetic number, because the mean of its divisors is an integer number (43027200).

Almost surely, 2^1223121130 is an apocalyptic number.

1223121130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1223121130 is an abundant number, since it is smaller than the sum of its proper divisors (1530619670).

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

1223121130 is a wasteful number, since it uses less digits than its factorization.

1223121130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5155.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1223121130 is about 34973.1487001099. The cubic root of 1223121130 is about 1069.4401619069.

Adding to 1223121130 its reverse (311213221), we get a palindrome (1534334351).

The spelling of 1223121130 in words is "one billion, two hundred twenty-three million, one hundred twenty-one thousand, one hundred thirty".