1213112130 has 64 divisors (see below), whose sum is σ = 2986841088. Its totient is φ = 315161280.

The previous prime is 1213112123. The next prime is 1213112143. The reversal of 1213112130 is 312113121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon 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, 627265 + ... + 629195.

It is an arithmetic number, because the mean of its divisors is an integer number (46669392).

Almost surely, 2^1213112130 is an apocalyptic number.

1213112130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213112130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1493420544).

1213112130 is an abundant number, since it is smaller than the sum of its proper divisors (1773728958).

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

1213112130 is a wasteful number, since it uses less digits than its factorization.

1213112130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2471.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1213112130 is about 34829.7592584273. The cubic root of 1213112130 is about 1066.5150338926.

Adding to 1213112130 its reverse (312113121), we get a palindrome (1525225251).

Subtracting from 1213112130 its reverse (312113121), we obtain a palindrome (900999009).

The spelling of 1213112130 in words is "one billion, two hundred thirteen million, one hundred twelve thousand, one hundred thirty".