1213221032310 has 64 divisors (see below), whose sum is σ = 3417629617152. Its totient is φ = 269812861056.

The previous prime is 1213221032299. The next prime is 1213221032311. The reversal of 1213221032310 is 132301223121.

It is a super-2 number, since 2×1213221032310² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213221032311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78063082 + ... + 78078621.

It is an arithmetic number, because the mean of its divisors is an integer number (53400462768).

Almost surely, 2^{1213221032310} is an apocalyptic number.

1213221032310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1213221032310 is an abundant number, since it is smaller than the sum of its proper divisors (2204408584842).

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

1213221032310 is a wasteful number, since it uses less digits than its factorization.

1213221032310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156141757.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1213221032310 its reverse (132301223121), we get a palindrome (1345522255431).

The spelling of 1213221032310 in words is "one trillion, two hundred thirteen billion, two hundred twenty-one million, thirty-two thousand, three hundred ten".