1213201110 has 64 divisors (see below), whose sum is σ = 3343576320. Its totient is φ = 278628480.

The previous prime is 1213201063. The next prime is 1213201127. The reversal of 1213201110 is 111023121.

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, 90477 + ... + 103016.

It is an arithmetic number, because the mean of its divisors is an integer number (52243380).

Almost surely, 2^1213201110 is an apocalyptic number.

1213201110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213201110 is an abundant number, since it is smaller than the sum of its proper divisors (2130375210).

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

1213201110 is a wasteful number, since it uses less digits than its factorization.

1213201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193533.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1213201110 is about 34831.0365909486. The cubic root of 1213201110 is about 1066.5411090276.

Adding to 1213201110 its reverse (111023121), we get a palindrome (1324224231).

The spelling of 1213201110 in words is "one billion, two hundred thirteen million, two hundred one thousand, one hundred ten".