1213220131310 has 64 divisors (see below), whose sum is σ = 2453075077824. Its totient is φ = 428180275200.

The previous prime is 1213220131283. The next prime is 1213220131327. The reversal of 1213220131310 is 131310223121.

It is a happy number.

It is a super-2 number, since 2×1213220131310² (a number of 25 digits) contains 22 as substring.

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, 173522 + ... + 1567338.

It is an arithmetic number, because the mean of its divisors is an integer number (38329298091).

Almost surely, 2^{1213220131310} is an apocalyptic number.

1213220131310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213220131310 is an abundant number, since it is smaller than the sum of its proper divisors (1239854946514).

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

1213220131310 is a wasteful number, since it uses less digits than its factorization.

1213220131310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394069.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1213220131310 its reverse (131310223121), we get a palindrome (1344530354431).

The spelling of 1213220131310 in words is "one trillion, two hundred thirteen billion, two hundred twenty million, one hundred thirty-one thousand, three hundred ten".