1213243110 has 48 divisors (see below), whose sum is σ = 3271269456. Its totient is φ = 323530848.

The previous prime is 1213243049. The next prime is 1213243127. The reversal of 1213243110 is 113423121.

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 23 ways as a sum of consecutive naturals, for example, 247209 + ... + 252068.

It is an arithmetic number, because the mean of its divisors is an integer number (68151447).

Almost surely, 2^1213243110 is an apocalyptic number.

1213243110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213243110 is an abundant number, since it is smaller than the sum of its proper divisors (2058026346).

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

1213243110 is an equidigital number, since it uses as much as digits as its factorization.

1213243110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499299 (or 499287 counting only the distinct ones).

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

The square root of 1213243110 is about 34831.6394962970. The cubic root of 1213243110 is about 1066.5534164703.

Adding to 1213243110 its reverse (113423121), we get a palindrome (1326666231).

The spelling of 1213243110 in words is "one billion, two hundred thirteen million, two hundred forty-three thousand, one hundred ten".